Answers
Answer:
isthmus
Explanation:
Isthmus: a narrow strip of land with sea on either side, forming a link between two larger areas of land.
This isthmus forms a link between North and South America.
Related Questions
In some animals, females select males as mates based on their ability to ward off infection as indicated by traits that the males possess. This is an example of ________.
Answers
This is an example of Sexual Selection.
Fitness in the evolution of a species plays an important role in the survival of the species by successfully producing offspring. For this purpose 'Sexual Selection' plays an important role because it helps the species to determine their mating partners so the traits will be passed on to the next generation.
Most often, the selection is done on the basis of the traits that the mating partner has to offer. Dimorphism and other selected traits help individuals of a species determine the fitness of its potential mates and select a suitable partner. Mostly, this selection is done by the females of that particular species who are more involved in trait compatibility.
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design and in vitro haemolytic evaluation of cryptolepine hydrochloride-loaded gelatine nanoparticles as a novel approach for the treatment of malaria
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Cryptolepine hydrochloride-loaded gelatine nanoparticles were produced and characterized as a means of studying formulation techniques to enhance the pharmaceutic profile of the compound. Cryptolepine hydrochloride-loaded gelatine-type (A) nanoparticles were designed base on the double desolvation approach.
What stands for Malaria disease?
Malaria is one of many diseases in the tropics which mankind have so far died to eradicate. It is forced by the plasmodium parasites of which one species, the Plasmodium falciparum is believed deadly. The main direction to malaria management is chemotherapy with antimalarial medications most of which have become ineffective (1), driving the need for newer agents as well as enhancing the effectiveness of existing ones through formulation techniques.
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Witch term describes an enzyme
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Explain how the sun's unequal heating of Earth's surface leads to the development of deserts around 30^{\circ} north and south of the equator.
Answers
A substance's temperature is a gauge of its molecular energy. They move more as the temperature rises.
The primary factor regulating the Earth's surface temperature is solar heating, which begins to operate at dawn and ends at nightfall. The surface heats up during the normal day and cools down at night. This is not always the case since occasionally warm or cold air will travel across the surface during unexpected wind events. The air above is heated or cooled as a result of changes in surface temperature, which causes air movement (wind). In the tropics, temperature causes water to evaporate, lifting warm, humid air to the sky. Over the tropics, the ascending air cools and releases a large amount of its water as rain. As the dry air continues to descend, it does so at an angle of about 30 degrees north and south, creating deserts in those areas.Learn more about the Earth's temperature with the help of the given link:
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What effect would you expect if you depolarized the neurons in the VTA (see Concept 48.3)? Explain.
Answers
Depolarization should start action potentials that release dopamine from the VTA neurons if it raises the membrane potential to or over threshold.
What happens when depolarization in the neurons occur?When a stimulus reaches a resting neuron, depolarization happens. The gated sodium ion channels on the membrane of the neuron rapidly open during the depolarization phase,
Allowing sodium ions (Na⁺) that are present outside the membrane to rush into the cell.
The voltage-gated sodium ion channels that were open throughout the depolarization process in the cell close once more after depolarization.
Therefore, ventral tegmental area (VTA) is affected by depolarized in the neurons.
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Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. how many peptide bonds are present in this protein?
Answers
The number of peptide bonds are present in this protein is 99; option 3.
What are polypeptides?
Polypeptides also know as proteins are macromolecules which are composed of monomers of amino acid units.
Polypeptides are formed when amino acids are linked to each other by peptide bonds.
Peptide bonds are formed between the α-nitrogen atom of the first amino acid and the carbonyl carbon atom of the second amino acid.
Therefore, a dipeptide consisting of two amino acid contains one peptide bond; a tripeptide consisting of three amino acid contains two peptide bonds.
In general, the number of peptide bonds in a polypeptide containing n amino acids is n -1
A polypeptide that contains 100 amino acids, will have 100 - 1 or 99 peptide bonds.
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Note that the complete question is given below:
Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. How many peptide bonds are present in this protein?
1. 101
2. 100
3. 99
4. 98
5. 97
A client is diagnosed with peptic ulcer due to h. pylori. the nurse would anticipate administering which agent in conjunction with an antibiotic?
Answers
The nurse would anticipate administering omeprazole in conjunction with an antibiotic for peptic ulcer due to H. Pylori infection.
Helicobacter pylori (H.pylori) is a gram-negative bacteria that is usually found in your stomach. It attacks the mucus lining of the stomach and causes damage. After the mucus lining is damaged enough, the HCl produced by the stomach enters the lining and causes sores or ulcers. This is referred to as H.pylori infection.
H. Pylori infection can lead to internal bleeding of the stomach that may be life-threatening. Other symptoms include nausea, vomiting, red, black stools, stomach pain, bloating, etc. Gastrointestinal endoscopy, CT scans, or upper Gastrointestinal Tests are usually done to diagnose the infection.
The treatment may include the use of medicines that kill the bacteria, reduces the HCl in the stomach, and prohibit HCl secretion. Antibiotics like amoxicillin, tetracycline, metronidazole, etc can be used to kill the bacteria. Omeprazole, esomeprazole, pantoprazole, etc can be used to reduce the amount of HCl. Cimetidine, Zantac 360, etc can be used to block histamine that triggers the stomach to release HCl.
The nurse when administering omeprazole with an antibiotic aims reduce the amount of HCl in the stomach as well as to kill the bacteria that causes the H. Pylori infection in the stomach.
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Big cats, such as the Siberian tiger (Panthera tigris altaica) shown here, are one of the most endangered groups of mammals in the world. Based on what you've learned in this chapter, discuss some of the approaches you would use to help preserve them.
Answers
The Amur tiger is most at risk from poaching, habitat loss, and illegal ungulate hunting. These animals are the tigers primary prey.
Roads are a significant threat to the Siberian tiger, (Panthera tigris altaica) because they make it easier for poachers to reach protected areas. In order to reduce illegal logging, safeguard habitat, boost prey populations, enhance public awareness, and reinforce anti-poaching efforts, our scientists and experts are collaborating with legislators, businesses, and communities. To lessen the impact of ecotourism, save the habitats of big cats, and maintain their number, it also included developing standards for tiger safaris at tourism motives.
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Which element has four electrons that are available to form strong bonds,
making it crucial for building large
biomolecules?
A. Sulfur
B. Oxygen
C. Hydrogen
D. Carbon
SUBMIT
Answers
Answer:
Carbon: is the correct answer for that question.
the testis-specific proteasome subunit prosa6t of drosophila melanogaster is required for individualization and nuclear maturation during spermatogenesis
Answers
The testis-specific proteasome subunit prosa6t of drosophila melanogaster is required for individualization and nuclear maturation during spermatogenesis melanogaster is required.
In eukaryotes, the 26S proteasome is responsible for the majority of controlled proteolysis. An end-cap regulatory particle and a catalytic core particle make up this big, multisubunit complex. A third of the 32 proteasome subunits discovered in Drosophila contain isoforms that are unique to the testis and are encoded by paralogous genes. Here, we characterise the Prosalpha6 (Pros35) core particle subunit and its Prosalpha6T testis-specific variant in detail during spermatogenic expression. Using transgenes with the GFP tag, it is demonstrated that the testis-specific Prosalpha6T becomes prominent in spermatid nuclei and cytoplasm after meiosis and persists in mature sperm, in contrast to the Prosalpha6 subunit, which is expressed in the early stages of spermatogenesis before gradually disappearing after meiosis.To learn more about spermatogenesis.
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Which organelle is
responsible for transporting
proteins the cell makes to be
processed, shipped out,
and/or used?
Answers
organelle is responsible for transporting proteins the cell makes to be
processed, shipped out by golgi appratus
Proteins obtained from the ER are further processed and sorted in the Golgi apparatus, or Golgi complex, where they are eventually transported to lysosomes, the plasma membrane, or secretion. As was already mentioned, the Golgi apparatus also produces sphingomyelin and glycolipids. The complex polysaccharides that make up the cell wall are also created in plant cells at the Golgi apparatus. The extensive range of cellular components that go down the secretory pathway are thus processed by the Golgi apparatus.
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even though it has "harmful" phenotypic effects, the "sickle cell" allele hasa relatively high frequency in sub-saharan africa compared to other parts of the world because of its ability to block the effects of malaria. this is an example of:
Answers
The scientists observed an increased frequency of the HbS allele in regions with a high incidence of malaria. This is because people with the sickle cell allele have a selective advantage in areas where there is a high incidence of malaria.
What is Sickle cell anemia ?An genetic condition where the red blood cells do not persist as long as normal red blood cells, have an irregular crescent form, and obstruct small blood vessels
A sickle cell gene deficiency is the root of sickle cell disease (SCD). Two sickle cell genes, one from each parent, are present in sickle cell disease patients at birth. Sickle cell trait refers to having one sickle cell gene from birth.A person with mild sickle cell disease might not have any effects on their daily life. However, the illness may be severe enough to materially affect a person's life. Strokes, severe infections, and lung issues are just a few of the health issues it can cause, some of which can be fatal.Learn more about Sickle cell anemia here:
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What is a chromosome
Answers
Answer:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.
Sheep and algae differ markedly in volatility of population size in the face of environmental fluctuations. Predict why?
Answers
Sheep are larger and thus have greater homeostatic resistance to physiological effects of environmental change.
Sheep are longer‐lived, and their populations consist of individuals born over a long period. algae systems have been used as models for studying life-history, of environmental population structure and consumer–resource dynamics This evens out effects on population size of short‐term fluctuations in birth rate. Light availability is a crucial environmental component that affects the quality of algae; when phosphorus is scarce, high light levels can result in large amounts of low-quality (high C:P ratio) algae, whereas low light levels encourage large amounts of higher-quality algae (low C:P ratio) algae.
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What do these images model?
OA atoms
OB. compounds
OC. elements
O D.mixtures
Answers
Answer:
A The answer is which is a which is Atoms
Over time, a group of cells experiences damage to their genetic material. as a result, the cells grow and divide out of control, turning cancerous. according to this information, these cells have?
Answers
Over time, a group of cells experiences damage to their genetic material. As a result, the cells grow and divide out of control, turning cancerous. According to this information, these cells have mutated.
We can define cancer as a disease in which certain cells of the body start to grow uncontrollably. These cells also start to invade other body parts hence causing a number of other diseases. There are over 100 more diseases that are linked to cancer.
The initiation of cancer usually occurs when a damaged cell gets mutated, as a result of which its division is not stopped and it begins to grow in an uncontrolled manner. The genetic material of such cells is damaged and hence genes for the repression of cell division are mutated.
Throughout the world, different types of research are taking place for the treatment of cancer. Usually, cancer is curable if it is diagnosed at the earliest stage.
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The __________ is the outer layer of the kidney, located just deep to the fibrous capsule.
Answers
Answer:
renal cortex
Explanation:
Bacteria as a group are incredibly metabolically diverse, but individual species are often highly specialized to reduce competition in their natural environment. This results in these species being unculturable because?.
Answers
It results in these species being unculturable because their growth may depend on factors provided by other organisms in their natural environment.
Growth factors are specialized nutrients that certain species need but others do not. They may be byproducts of the metabolism of other organisms and are thus not available in a lab setting.
And while some media may include poisons due to the media itself or the water used to create it, it is still feasible to modify recipes to suit picky microorganisms.
Although bacteria as a whole have a remarkably varied range of metabolic processes, many species are highly specialized to lessen competition in their native habitats.
Because their growth may be dependent on essential growth elements supplied by other creatures in their natural habitat, it renders these species uncultivable.
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The process in which a network of species undergoes reciprocal evolutionary change through natural selection is referred to as?
Answers
The process in which a network of species undergoes reciprocal evolutionary change through natural selection is referred to as diffuse coevolution.
Reciprocal evolutionary change, or diffuse coevolution, is a process by which a network of species undergoes evolutionary change in response to each other. This process is thought to be an important factor in the maintenance of biodiversity.
Diffuse coevolutionary processes are thought to operate on a variety of scales. For example, plant-pollinator interactions are thought to be an important driver of plant biodiversity. These interactions are thought to promote plant speciation through the process of pollinator-driven selection. In addition, predator-prey interactions are thought to promote reciprocal evolutionary change between these groups of organisms.
The study of diffuse coevolution is ongoing, and its importance in the maintenance of biodiversity is still being explored. However, the process is thought to be a key driver of evolution and should be considered when studying the interactions between different species.
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The excel feature that generates and extends values into adjacent cells based on the values of selected cells is?
Answers
Autofill is the excel feature that generates and extends values into adjacent cells based on the values of selected cells.
What is Microsoft excel?A piece of software developed by Microsoft that employs formulae and functions to arrange data and numbers using spreadsheets. Financial analysis is performed by companies of all sizes using Excel analysis, which is widely used worldwide.
Excel is frequently used for data organization and financial analysis. It is utilized by businesses of all sizes and in all business operations. Numerous features, formulae, and shortcuts are built into the Excel software application, which may be utilized to increase its usefulness.
Therefore, the auto fill is the excel feature that generates and extends values into adjacent cells based on the values of selected cells.
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Enzymatic activity that changes a medication into a less active form is an example of?
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Enzymatic activity that changes a medication into a less active form is an example of pharmacokinetics.
The study of pharmacokinetics explains how the body processes medications. Pharmacodynamics studies the physiological effects of medications. The transfer of a chemical from a region of higher concentration to one of lower concentration is known as diffusion. The movement of a chemical against a concentration or gradient is known as active transport.
The study of how the body reacts to drugs provided over the course of exposure is known as pharmacokinetics (PK) (medications for the sake of this article). This is closely related to pharmacodynamics, which closely investigates the drug's impact on the body, but it differs from it in important ways.
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Review Figure 7.10 , which illustrates the diffusion of dye molecules across a membrane. Could diffusion eliminate the concentration gradient of a dye that has a net charge? Explain.
Answers
When additionally charged molecules pass over a membrane do charge dye molecules equilibrate. If not, a chemical gradient that counteracts membrane potential will form.
What is a concentration gradient?The steady variation in a solution's solute concentration as a function of distance is referred to as a concentration gradient. The solvent (the element that dissolves, such as water) and the solute are the two main components of a solution (the particles that are dissolvable by the solvent).
Concentration in biochemistry refers to the quantity of a solution's subcomponent, such as the number of solutes present. A variable's gradual increase or decrease with regard to distance is generally referred to as a gradient. In this case, a concentration gradient would result from varying solute concentrations in the two solutions.
Therefore, when additionally charged molecules pass over a membrane charge dye molecules equilibrate. If not, a chemical gradient that counteracts membrane potential will form.
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Bird that migrates from its arctic breeding grounds to antarctica, covering over 25,000 miles.
Answers
Arctic terns are the birds that migrates from its arctic breeding grounds to Antarctica, covering over 25,000 miles.
Temperature variations in the polar regions are less pronounced than in other parts of the world. The number of daylight hours varies greatly in different places, though. The Arctic and Antarctica receive about 24 hours of sunlight in the summer. Wintertime is nearly completely dark. Terns move south in quest of the summer sun. Birds can see fish or insects more clearly because sunlight makes the ground and ocean's surface more visible. The sea is typically calmer during the summer, which makes it easier for birds to fly.
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Provide another example of a homeotic gene mutation that leads to organs being produced in the wrong place (see Concept 18.4).
Answers
Answer:
to organs
Explanation:
In the absence of infection, what percentage of cells in human blood are leukocytes?
Answers
Even while your white blood cells make up only around 1% of your blood, they have a significant impact.
The term "leukocyte" also refers to white blood cells. You are shielded from disease and illness by them.Red blood cells, white blood cells, platelets, and plasma all make up your blood. Think of white blood cells as your body's defense mechanisms. They are, in a sense, constantly at war. They circulate through your bloodstream to fend off bacteria, viruses, and other harmful foreign invaders. White blood cells rush to the scene when your body is in crisis and a specific location is being attacked in order to assist in destroying the pathogen and avert sickness.The bone marrow produces white blood cells. They are kept in the lymph and blood tissues of your body. Your bone marrow constantly produces white blood cells since some of them have a short lifespan of just one to three days.Learn more about the leukocytes with the help of the given link:
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The process of aerobic cellular respiration breaks down a glucose molecule in order to generate a large number of atp molecules. What type of pathway is this?.
Answers
The process of aerobic cellular respiration that breaks down glucose molecules to generate a large number of ATP molecules is a catabolic pathway.
The process of aerobic cellular respiration breaks down a glucose molecule to generate energy in the form of ATP. Aerobic cellular respiration is the process of catabolism, in the presence of oxygen, of converting nutrients into carbon dioxide, water, and energy. It uses the electron or active transport system for its mechanism. Most eukaryotes and prokaryotes use aerobic respiration to obtain energy from glucose. One molecule of glucose can produce 36 units of ATP.
Aerobic respiration involves three main stages: glycolysis, citric acid cycle, and oxidative phosphorylation. Glycolysis refers to the breakdown of glucose into pyruvate. Pyruvate then is converted to acetyl coenzyme A (CoA) through Kreb's cycle. Acetyl CoA then undergoes oxidative phosphorylation to produce 36 molecules of ATP.
Catabolism refers to the destruction of macromolecules into, smaller and absorbable molecules, macromolecules. As aerobic respiration involves breaking down glucose to obtain ATP, it is referred to as a catabolic pathway.
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If you stimulated a sensory neuron electrically, how would that stimulation be perceived?
Answers
You will feel the electrical stimulation as if the sensory receptors that regulate those neurons were activated.
Summary:For example, electrical stimulation of sensory neurons controlled by menthol-activated thermoreceptor can be considered as local cooling.
What are thermoreceptor?thermoreceptor are free nerve endings residing in the skin, liver, and skeletal muscle, as well as the hypothalamus, with cold receptors 3.5 times more common than thermoreceptor.
Where do thermoreceptor work?thermoreceptor are specialized proteins on nerve endings under the skin that allow the body to detect changes in hot or cold temperature.
How do thermoreceptor work?The thermoreceptor that responds to capsaicin and other thermogenic chemicals is called TRPV1. In response to heat, the TRPV1 receptor opens passages that allow ions to pass through, causing a feeling of warmth or burning.
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You are exploring kidney function in kangaroo rats. You measure urine volume and osmolarity, as well as the amount of chloride Cl⁻ and urea in the urine. If the water source provided to the animals were switched from tap water to a 2% NaCl solution, what change in urine osmolarity would you expect? How would you determine if this change was more likely due to a change in the excretion of Cl⁻ or urea?
Answers
When NaCl solution is given to the animal, this will cause a high concentration of NaCl in the body. In response, the kidneys will excrete the excess to restore the balance. The osmolarity of the urine will therefore have a higher concentration of NaCl. This could be determined by a urine test for urea or chloride.
The quantity of dissolved particles per unit of water in the urine is measured by its osmolality. Urine osmolality, a more reliable indicator of urine concentration than specific gravity, aids in the diagnosis of renal diseases affecting urinary concentration and dilution as well as the evaluation of hydration status. 500 to 800 mOsm/L is considered typical.
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the term used to describe the fetus’s likelihood of surviving outside of the uterus if born preterm or prematurely is called .
Answers
When the preterm baby surviving outside of the uterus called mico preemies.
What happens to a preterm baby ?Babies born premature may more health problems at birth and later in life than babies born later. Premature babies can have long term Intellectual and developmental disabilities and problem with their lungs , brain , eyes and other organs.
When the preterm baby has chances to survive outside the uterus called micro preemies.
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why is fructose a major benefit of our daily life
Answers
Answer: Fructose is a natural sugar present in fruits, fruit juices, certain vegetables, and honey. In these forms, fructose sugars can be part of a nutritious diet.
However, fructose is also a component of high fructose corn syrup, which manufacturers make from corn starch and add to foods such as sodas and candies. These foods are less nutritious, but a person can eat them in moderation.
Researchers are studying the links between high fructose foods and obesity, diabetes, and even some cancers. However, some evidence indicates that fructose is not necessarily a public health concern when a person consumes it in moderation.