The interquartile range of the data set of the heart rates of 10 adults is 21.
What is the interquartile range of the data set of the heart rate of 10 adults?The interquartile range of a set of data is given as the difference between the lower median value and the upper median value of the data.
To calculate the interquartile range of the data set of the heart rates of 10 adults, we arrange the data first in increasing order as given below:
83, 87, 90, 92, 93, 100, 104, 111, 115, 121
The data set is an even dat set and is divided into five values each.
The lower median of the set is obtained as follows:
83, 87, 90, 92, 93; lower median value = 90
The upper median of the set is obtained as follows:
100, 104, 111, 115, 121; upper median value = 111
The interquartile range = upper median - lower medianThe interquartile range = 111 - 90
The interquartile range = 21
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Can you pick out the mossy leaf-tailed gecko lying against the tree trunk in this photo? How is the appearance of the gecko a benefit in terms of survival? Given what you learned about evolution, natural selection, and genetic information in this chapter, describe how the gecko's coloration might have evolved.
There is a good chance that the Gecko's coloring makes it simpler for it to seek insects.
It is possible that the Gecko's coloring makes it more difficult for it to be spotted by potential predators.
This is further explained below.
What is evolution?Generally, Evolution is what scientists mean when they talk about changes that take place in the inherited characteristics of biological populations over the course of several generations.
These characteristics are the results of genes being passed down from a parent to a kid during the process of reproduction. Genes are passed down from a parent to a child.
In conclusion, There is a high likelihood that the color of the gecko makes it easier for it to look for insects.
It is likely that the color of the Gecko makes it more difficult for it to be seen by prospective adversaries that would want to consume it.
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2. You have already learned about the formation of metamorphic, sedimentary, and igneous rocks. Use what you know to construct an explanation about how you think melted rock deep within Earth could change over time and one day look like the image on this page.
Answer:
one day the inside of earth would be filled with plastics and trash because of large trash fields
Explanation:
shifting of activation center in the brain during muscle fatigue: an explanation of minimal central fatigue
Evidence suggests that a voluntary motor exercise that causes significant muscular exhaustion does not cause the overall level of cortical activation to diminish as much as the activation level of the motor neuron pool projecting to the muscle.
What is motor neuron pool?A group of motor neurons that are dispersed throughout a few levels of the spinal cord but whose axons all attach to the same muscle.
It is brought on by an issue with motor neurons, which are brain and nerve cells. These cells progressively cease producing extra energy.
You may be more susceptible to developing motor neuron disease or front temporal dementia if you have a close family who has either of these conditions.
Therefore, during muscle fatigue, shifting of activation center in the brain.
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The center of activation in the brain shift from one location to a different location once neurons within the previous location become played out.
What is Central Fatigue?
Central fatigue is outlined as a deficient drive of motor cortical output attenuating performance or perhaps stopping the activity, whereby restrictive and excitant processes are affected.
Brain is the mass of nerve tissue withinside the anterior stop of an organism.
The brain, along with the spinal cord, constitutes the central nervous system.
The development is that the brain is an organ with inbuilt redundancies: it's multiple motor centers and parallel pathways.
Therefore, it can shift from one location to other during muscle fatigue.
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2018 liu comparative study of phrenic and partial ulnar nerve transfers for elbow flexion after upper brachial plexus avulsion a retrospective clinical analysis.pdf
The broadly used nerve switch sources for elbow flexion in sufferers with pinnacle brachial plexus avulsion UBPA encompass partial ulnar nerve phrenic nerve and intercostal nerves.
A retrospective evaluation of twenty-one sufferers treated with phrenic and partial ulnar nerve transfers for elbow flexion after UBPA become executed.
In the phrenic nerve transfer institution, the phrenic nerve changed into transferred to the anterolateral package of the anterior department of the upper trunk; inside the partial ulnar nerve switch corporation, one fascicle of the ulnar nerve became transferred to the biceps department. The British scientific studies Council MRC grading machine, the attitude of elbow flexion, electromyography EMG, and the Disabilities of the Arm, Shoulder, and Hand dash questionnaire scoring were used to evaluate the recovery of elbow flexion at least three years postoperatively.
The performance of motor features in phrenic nerve switch establishments come to be eighty- percentage while it modified to 80 percentage in partial ulnar nerve transfer enterprise. The exceptional costs of the angle of elbow flexion were sixty-four percent and seventy percentage in phrenic and partial ulnar nerve transfer businesses, respectively.
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Which type of enzyme, produced in the walls of the small intestine, removes single amino acids from the end of small polypeptides?
Exopeptidase enzyme, produced in the walls of the small intestine, removes single amino acids from the end of small polypeptides.
Of those five components, pepsin is the predominant enzyme worried with protein digestion. It breaks down proteins into smaller peptides and amino acids that may be without trouble absorbed inside the small intestine. Proteins are digested via the pancreatic enzymes trypsin chymotrypsin, and carboxypeptidase.
The enzymes that act within the small intestine are amylase protease and lipase. Amylase acts on starch and breaks it down into small carbohydrate molecules. Protease acts on proteins and breaks them down into amino acids. Lipase breaks down dietary fats into smaller molecules called fatty acids and glycerol. Amylase digests carbohydrates, lipase digests fat, and trypsin digests proteins. The pancreas also secretes big portions of sodium bicarbonate.
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suppose we have noticed that some rats seem to couple more often than others. this would correspond to which step in the scientific method?
According to the steps of the scientific method, observing some rats couple more often than others is part of the OBSERVATION step. It occurs when the experiment is already being carried out.
What are the steps of the scientific method?
There are different steps to follow in a scientific method
Definition and problem statement. The question for which there is no answer yet. A question the investigator wants to answer.Goal specification. The goal is what the investigator wants to know.Hypothesis formulation. The researcher hypothesizes in order to predict what is going on or what is expected to occur.Experiment. Different variables influencing the project are considered. This step involves testing the observations. Data collection and analysis stages.ResultsDiscussion and hypothesis verification. This step involves the deriving of the working hypothesis.Conclusions.In the exposed example, observing some rats couple more than others is part of the OBSERVATION step. It occurs when the experiment is already being carried out.
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innate immune memory contributes to host defense against recurrent skin and skin structure infections caused by methicillin-resistant staphylococcus aureus.
The most common cause of infections of the skin and skin structures is Staphylococcus aureus (SSSI). The high rate of recurrent SSSI brought on by S. includes methicillin-resistant S. aureus
Despite having high levels of specific antibodies and circulating T cells, MRSA strains of S. aureus suggest that conventional adaptive immunity only provides partial protection. We proposed that the protective host defense against recurrent MRSA infection involves innate immunological memory. SSSI was induced in wild-type and rag1-/- mice from the BALB/c and C57BL/6 backgrounds in order to test this theory. Reduced abscess severities and lower CFU densities compared to those in naive controls show that prior infection (priming) of wild-type and rag1-/- mice of either background provided protection against repeat infection.Interestingly, for wild-type and rag1-/- mice, protection was higher on the previously infected flank than on the naive flank. Increased infiltration of neutrophils (polymorphonuclear leukocytes [PMN]), macrophages (M), Langerin+ dendritic cells (LDC), and natural killer (NK) cells were associated with protective efficacy in wild-type mice. Interleukin-17A (IL-17A), IL-22, and gamma interferon (IFN-), as well as the antimicrobial peptides CRAMP and mD-3, were all related with protection. Additionally, priming resulted in enhanced M and LDC infiltration as well as the activation of IL-22, CRAMP, and mD-3, which protected rag1-/- mice from recurrent SSSI. These results imply that in recurrent MRSA SSSI, innate immunological memory, through particular cellular and molecular pathways, likely contributes to the localized host defense. These discoveries encourage the creation of focused immunotherapeutic approaches to deal with the problem of MRSA infection.To learn more about Staphylococcus aureus visit:
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DUE TODAY:
How do your two selected body systems interact with one another under normal conditions on Earth to help the human body function efficiently?
two selected body systems: immune system, lungs and respiratory system
The two selected body systems immune system and respiratory system interact with one another under normal conditions on Earth to help the human body function efficiently by complementing each other's function if the lungs get infected the immune system will remove the infection by sending the white blood cells, on the other hand, the respiratory system transfers oxygen to all the cells in the body through the blood which is required for the metabolism of the cells.
Lungs are powerful immune organs and carry macrophages, upon infection which might divide into alveolar macrophages and interstitial macrophages, bronchial epithelial cells, and Natural killer cells along with other innate lymphoid cells, and different T and B cells.
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the thymus: a.continues to grow throughout life, peaking in size in late middle age. b.is the largest of the lymphatic structures. c.is located high in the upper quadrant of the abdomen and lateral to the stomach. d.helps t lymphocytes mature.
The thymus is an endocrine gland that makes and helps certain white blood cells called T-lymphocytes mature. Hence, the answer is option D.
In your upper chest, just behind your sternum (breastbone) and in front of your heart, a small lymphatic gland can be found there, called the thymus. It helps to produce and train special white blood cells called T-Lymphocytes or T-cells.
The lymphatic system consists of various vessels, tissues and organs that defend against diseases and infections. They are part of the immune system. The cells that defend against diseases are called T-Lymphocytes. They are manufactured in the bone marrow, then transported to the thymus where they mature and become specialized.
The thymus gland starts to make T-Lymphocytes before birth. It is most active during childhood and stops working after puberty. At this stage, the body has all the T-Lymphocytes it needs.
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White Blood cells cover the ____________________ and ______________________ of our body’s organs.
White Blood cells cover the immune system and defense of our body’s organs.
immune systemdefenseWhat are white blood cells?White blood cells are a set of cells produced in the bone marrow that are part of the body's immune system. Also called leukocytes, white blood cells can be found in blood, lymph, lymphoid organs, and various connective tissues.
With this information, we can conclude that Leukocytes or white blood cells are formed elements of the blood whose function is to defend against foreign organisms.
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Once a carousel is in motion, the constant movement of the carousel horse around the center of the circle can best be described as?
Once a carousel is in motion, the constant movement of the carousel horse around the center of the circle can best be described as acceleration or change in velocity.
What is acceleration?We refer to any process where the velocity changes as acceleration. You can only accelerate by changing your speed, direction, or both as velocity is a function of both speed and direction.
Example-No matter how quickly you're moving, you can't possibly be accelerating if you're not also altering your direction and speed. As a result, even if a jet is traveling at a high rate of speed in this case, 800 miles per hour it experiences no acceleration because its velocity is constant. The jet will accelerate as it slows down when it lands and swiftly comes to a stop.
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Lichen is often the first organism to appear in an area that has had all life stripped from it because of some disturbance. what is lichen in this regard?
Lichen is often the first organism to appear in an area that has had all life stripped from it because of some disturbance. In this regard, lichen is the pioneer species.
In the field of ecology, pioneer species can be described as the first species that colonize a particular land that did not have growth of other life forms before or the area was disrupted due to a disaster.
It is due to pioneer species that life begins to form in a disrupted area again. Lichens are often the first kind of pioneer species to grow on barren land because they have the capability to grow on rocks. The lichens then, with the passage of time, break down these rocks so that soil can be formed. Also, lichens themselves die and their decomposition makes the soil richer with nutrients. As a result, small plants start growing on the land, and in this way, other organisms start to invade that land.
Hence, lichens are often the pioneer species that are seen in secondary succession.
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The presence of bacterial lipopolysaccharide (LPS) in the blood is a major cause of septic shock. Suppose you have available purified LPS and several strains of mice, each with a mutation that inactivates a particular TLR gene. How might you use these mice to test the feasibility of treating septic shock with a drug that blocks TLR signaling?
Lipopolysaccharides (LPS) are important components of gram-negative bacteria's outer membrane. They are large amphipathic glycoconjugates composed of a hydrophobic lipid domain attached to a core oligosaccharide and a distal polysaccharide.
What is meant by endotoxins?
Endotoxins are more commonly known as bacterial lipopolysaccharides. These are cell wall components that are released during bacterial cell lysis. They activate the body's innate immune system, causing inflammation, fever, and a drop in blood pressure. According to reports, the toll-like receptor 4 (TLR4) is the human body's receptor for LPS.
A mouse's susceptibility to LPS differs from that of humans. Mice are more resistant to endotoxins. To avoid false positives, the dosage for mice must be optimized before beginning the experiment.
To determine which TLR is responsible for TLR susceptibility, each TLR mutant is given a known dose of LPS, which is known to cause sepsis in a healthy wild-type mouse. The mice that develop symptoms after LPS administration have a functional LPS receptor, indicating that the mutant TLRs present in them are not involved in LPS reception.
The mice that do not respond to LPS are resistant to sepsis, most likely because the TLR with which the LPS interacts is inactive. As a result, it provides us with information about the receptor. We can now identify a drug molecule that inhibits this receptor in healthy mice and prevents sepsis.
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you are looking under a microscope at a cell from an organism that has a diploid number of 12. the cell appears to contain 24 total chromosomes that appear to be moving away from the center of the cell. in which phase of the cell cycle is this cell?
The phase of the cell cycle in which a cell with a diploid number of 12 that contains 24 chromosomes that move away from the center of the cell is Anaphase.
What is Anaphase?Anaphase is the step of cell division (mitosis) in which chromosomes travel to the poles in order to prepare for telophase and cytoplasm division.
Metaphase is a cell division phase before anaphase in which duplicated chromosomes are along the equator of the cell.
Moreover, a diploid cell that contains 24 chromosomes in cell division will have half the amount (ie., 12 chromosomes) after this process.
In conclusion, the phase of the cell cycle in which a cell with a diploid number of 12 that contains 24 chromosomes that move away from the center of the cell is Anaphase.
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Macrophages in the lungs prevent pneumonia infections by surrounding, engulfing, and destroying streptococcus pneumoniae bacteria. this is an example of which type of endocytosis?
The lungs prevent pneumonia infections by surrounding, engulfing, and destroying streptococcus pneumoniae bacteria this is an example of Phagocytosis.
Alveolar macrophages, also known as pulmonary macrophages or dust cells, are specialised phagocytes that are located in the airways and at the level of the alveoli in the lungs but are not attached to their walls. Following the formation of this bridge, membrane protrusions encircle the bacteria and take them into the phagosome, which is created by the fusion of cell membranes.Invading bacteria are first encountered by macrophages, which are also in charge of phagocytosing and digesting pathogens to start the innate inflammatory response. The phagocytic/endocytic and lysosomal pathways, which contain proteolytic enzymes such cathepsins, are closely related and enable intracellular digestion.To learn more about Phagocytosis.
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In a controlled experiment, what is the experimental group compare to
The experimental group in a control experiment is the one who is subjected to the effects of the experiment's variables.
The experiment's findings are revealed by the changes that follow treatment. However, the control group is the one that is not subjected to any variation. For comparison with the experimental group, it is retained as a benchmark. In an experiment, the experimental group is contrasted with the control group. The experimental group's change in the independent variable is the only distinction between the two groups. The control group "controls" or maintains the independent variable at its original value.
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How are bacteria a study in contradictions?
Bacteria are a study in contradictions because each bacterium has its controversies due to growth and development in culture medium.They have made possible our understanding, at the molecular level, of hundreds of disease-relevant proteins that in turn has enabled rational drug design to improve human health.
How are bacteria being used in research?Applications of basic research on bacteria are essential for medicine, the pharmaceutical industry, biotechnology, bioremediation, and alternative energy production. Developing these applications will demand integration of many scientific disciplines.
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Give an example of apoptosis during embryonic de velopment, and explain its function in the developing embryo.
The loss of cells that produce the webbing between the fingers and toes of a growing foetus or paw in animals is an immediately identifiable example of apoptosis during embryonic development.
This permits the digits to move independently of one another, i.e., it shapes the digits of the hand or paw such that they are not webbed (This happens at the stage of cell differentiation during cell growth). This does not always occur throughout development, resulting in some new-borns being born with webbing that must be surgically removed. Water birds with webbed feet have a lack of apoptosis in these locations.
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The thick walled inferior chambers of the heart that pump blood into the artiers are called?
The ventricles, which are the pumping chambers, are the lower chambers. The heart has four valves that aid in regulating the direction of blood flow. The body's low-oxygen blood returns and enters the right atrium.
What is inferior chambers of the heart?Normally, the heart has two upper chambers and two lower chambers. Incoming blood enters the top chambers, the right and left atria.
The Right and Left inferior heart chambers, which are responsible for blood pumping; The left ventricle pumps blood into the body's circulation.
To carry oxygen to all the organs and tissues, whereas the right ventricle pumps blood into the lungs to absorb oxygen.
Therefore, ventricles are thick walled inferior chambers of the heart that pump blood into the atrium.
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which of the following is not a major difference between dna and rna? answer: which of the following is not a major difference between dna and rna? dna is found in the nucleus and cytoplasm, but rna is only found in the nucleus dna is a double-stranded helix and rna is a single-stranded helix dna uses deoxyribose and rna uses ribose as their respective pentose sugars dna contains thymine, but rna contains uracil instead
The statement that is not a major difference between DNA and RNA is that DNA is found in the nucleus and cytoplasm, but RNA is only found in the nucleus (option A).
What is nucleic acid?Nucleic acid is any biological macromolecule consisting of multiple repeat units of phosphate group, sugar and purine and pyrimidine bases.
The two nucleic acids are as follows;
Deoxyribonucleic acid (DNA)Ribosenucleic acid (RNA)The difference between DNA and RNA are as follows;
DNA is a double-stranded helix while RNA is a single-stranded helix DNA uses deoxyribose while RNA uses ribose as their respective pentose sugars DNA contains thymine, but RNA contains uracil insteadTherefore, the statement that is not a major difference between DNA and RNA is that DNA is found in the nucleus and cytoplasm, but RNA is only found in the nucleus.
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The distinguishing characteristic between tight junctions and adherens junctions is that?
The adherens junction attaches to the actin myofilaments of the cytoskeleton and the tight junctions do not attach to the actin myofilaments.
What are actin myofilaments?Actin is a protein that significantly contributes to the ability of muscle and other cells to contract. There are two types of it: monomeric globular actin (G-actin) and polymeric fibrous actin (F-actin), which is used for muscle contraction.
Myosin, the most prevalent protein in muscle, is made up of thick filaments that alternate and interdigitate with two long strands of bead-like actin molecules to produce a thin filament in muscle. Actin and myosin are activated when a signal for muscular contraction travels via a neuron to a muscle cell.
Myosin functions as a motor, releasing energy from the hydrolysis of adenosine triphosphate (ATP) to drive a myosin filament along an actin filament, causing the two filaments to glide past one another. Tropomyosin and troponin, two additional muscle proteins, control the momentary union of actin and myosin that causes muscular contraction.
Therefore, the adherens junction attaches to the actin myofilaments of the cytoskeleton and the tight junctions do not attach to the actin myofilaments.
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Why are many drugs that are used to treat nervous system diseases or to affect brain function targeted to specific receptors rather than particular neurotransmitters?
These medications can reduce brain activity, which makes them effective for treating anxiety, panic, severe stress reactions, and sleep issues.
What is effect of drug on nervous system?While certain neurotransmitters provide excitatory signals across synapses, others send inhibitory signals.
Sedatives, tranquilizers, and hypnotics are examples of medications known as central nervous system (CNS) depressants.
These medications can reduce brain activity, which makes them effective for treating anxiety, panic, severe stress reactions, and sleep issues.
Therefore, drugs that are used to treat nervous system diseases or to impact brain function.
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what do you notice is the main difference between the structure of the connective tissues and the structure of the epithelium? make sure to note the organization of cells in these two tissue types. how does this structure relate to function?
In the structure of epithelium, the cells are arranged in a regular fashion, either in a single layer or stacked one upon another to form many layers. Whereas in the connective tissues, the arrangement of the cells depends upon the location of the tissue, the cells are arranged irregularly. They can be either loosely packed or densely packed.
Since the function of epithelium is to form the outer layer of the skin or form the lining of organs, therefore the cells are arranged in a regular fashion to completely cover the organ they are present in.
Connective tissues have the function of supporting the other tissues or organs. For this the cells are arranged in an irregular haphazard manner so that they support the organ as well as remain light-weighed.
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how likely is it that organisms will respond to rapid climate change by undergoing short-term evolutionary adaptations? group of answer choices it is not very likely; evolution will not begin to occur until it is clear that climate change is a long-term process. it is not very likely; evolution occurs continually, but it may be too slow, or a population’s genetic variation may be too small, to keep up with rapid climate change. it is very likely; all organisms respond to environmental change through evolution. it is very likely; populations are much more likely to respond to short-term changes than to long-term ones.
It is not very likely that organisms will respond to rapid climate change by undergoing short-term evolutionary adaptations; evolution occurs continually, but it may be too slow, or a population's genetic variation may be too small, to keep up with rapid climate.
Evolution can be described as the particular changes that are observed in a species over a period of time in order for it to adapt to a changing environment.
The process of evolution is not a rapid one and it takes many years for a species to completely change. It might happen that a population might be too small to respond to a rapid change. In such a scenario, either the population is all dead or migrates to places where conditions are favorable. Hence, it is not very likely that a population of organisms will respond to rapid climate change through short-term evolutionary adaptations. Evolution might occur but the process will never be a rapid one. The changes will be continual but too slow.
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The nervous system and endocrine system control the body's functions by?
The nervous system and endocrine system control the body's functions by influencing many aspects of human behavior.
The endocrine system and the nervous system collaborate to influence many aspects of human behavior, including reproduction, growth, and metabolism. And indeed the endocrine system is crucial in the regulation of emotions. Hormones help explain some of the observed behavioral differences between men and women because the glands in women and men differ.
A gland in the endocrine system is a collection of cells that secrete hormones. A hormone is a substance that circulates throughout the body and aids in the regulation of emotions and behaviors.
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In a short essay (100-150 words), describe at least three ways in which the structure of the lens of the human eye is well adapted to its function in vision.
The three separate layers of the human eye, which are virtually spherical in shape, each have distinctive features that correspond to the function of the eye.
What is Eye lens ?The inner layer of the eyelid is made up of a membrane structure called the conjunctiva, which is responsible for producing mucus. This mucus assists in lubricating the eye's structure and also kills microorganisms, preventing infection and facilitating smooth eye motions for clear vision.
The curved form of the eye is due to the sclera, an outer component; this curvature makes it easier to focus on both nearby and faraway objects.Another important component of the eye is the lens, which aids in concentrating light rays that enter through the pupil and transmits them to the retina layer for processing and picture generation.Learn more about Human eye here:
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When sperm and ovum fuse at conception, they produce a zygote that typically has _____ chromosomes
When sperm and ovum fuse at conception, they produce a zygote that typically has 46 chromosomes.
The sperm cells and egg cells divide by a process referred to as meiosis. The process of meiosis ensures that crossing over occurs in the chromatids in order for variations to occur. It also ensures that the number of chromosomes in the gamete cells is reduced to half.
This reduction of chromosome number to half at the time of meiosis is important for maintaining the stability of chromosomes in offspring. Hence, as humans have 46 chromosomes in total, the egg cells and the sperm cell will have 23 chromosomes each.
When the sperm and ovum fuse at the time of conception, then the number of chromosomes will be maintained at 46 in the zygote being produced.
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Which statement describes what is most likely to occur once equilibrium has been established?
Choose 1 answer:
a) More molecules will be found at the bottom half of the box as compared to the top
half.
b) More molecules will be found at the top half of the box as compared to the bottom
half.
c) The molecules will no longer move across the membrane and their overall
distribution will remain equal on both sides of the membrane.
d) The molecules will continue to move across the membrane, but their overall
distribution will remain relatively equal on both sides of the membrane.
Answer:
the molecules will no longer movie across the membrane and their over all distribution will remain equal and both sides of the membrane is a right answer please brainliest answer
Answer:
The molecules will continue to move across the membrane, but their overall distribution will remain relatively equal on both sides of the membrane.
Explanation:
this is the right answer on khan the other guys that answer this question is wrong
The neural impulse traveling down the axon is _______; it gets across the synapse by_______
The neural impulse traveling down the axon is electrical; it gets across the synapse by the remaining electrical means too via the dendrites of the neuro to the axon of the next neurons.
This goes to say that the nerve impulses which is traveling through the axon of a neuron travels down the axon through chemical or electrical impulse and it gets across the synapse by the remaining electric means too via the dendrites of the neuro to the axon of the next neuron.
The only means through which information are passed from one part of the body to another is by nerve electrical impulses
What is a neuron?A neuron can simply be defined as the functional and basic unit of nervous system.
There are three major types of neurons, these are as follows:
Motor neuronsSensory neuronsIntermediate neuronsSo therefore, the neural impulse traveling down the axon is electrical; it gets across the synapse by the remaining electric means too via the dendrites of the neuro to the axon of the next neuron.
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which macromolecule is the primary component of cell membranes and which macromolecule is the primary energy storage ?
Lipids is the main element and the main source of energy storage in the cell membrane.
What is lipids?Any of a wide range of organic substances that are classified together as lipids because they do not significantly interact with water, such as fats, oils, hormones, and some membrane components. The adipose cells, which act as an organism's energy storage depot and thermal insulator, sequester one form of lipid, the triglycerides, as fat. Some lipids, like steroid hormones, transmit messages between biochemical systems inside a single cell whereas others act as chemical messengers between cells, tissues, and organs. Organelles (structures within cells) and cell membranes are tiny thin structures made of two layers of phospholipid molecules.
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