Caracteristicile fierului :
Oligoelement abundent în corpul uman
În alimentație, facem distincție între sursele de fier hem și cele de fier non-hem.
Fierul hem din carne și pește este mai bine absorbit
Anemia feriprivă este foarte frecventă și poate fi cauzată de un aport scăzut de fier
Femeile de vârstă fertilă și femeile însărcinate au o nevoie crescută de fier
A game warden found a deer in the woods that had been shot. the carcass of the deer had its antlers removed and was found 35 days after the hunting season began. insects found on the carcass were the adult cheese skipper and pupal cases of the blowfly. the daily average temperature was 77 degrees f and 25 degrees c. use the information found within this lesson to calculate how long ago the deer was shot. was the deer shot before or during deer season? defend your answer and tell how you came up with your calculations.
Yes, the deer was killed during the hunting season. The possible reasons are listed below using forensic entomology.
The study of insects and other arthropods for forensic purposes is known as forensic entomology. Insects are drawn to the decaying carcass from the beginning and may lay their eggs there. The forensic entomologist may learn a lot from the living and dead insects they find at the scene of a crime, including the time and place the crime occurred, whether drugs were administered to the victim, and in murder cases, the time since the victim's death and how long the body had been there.
First to appear is the blowfly, where we can only see pupal cases, indicating that the deer has been slain for more than 16 days. Cheese skippers only have an impact when protein is decaying. The deer may therefore be killed during in the hunting season.Learn more about forensic entomology
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How do response mechanisms in target cells differ for water-soluble and lipid-soluble hormones?
The majority of hormones produced by the body fall into one of three categories:
lipid-derived hormones, amino acid-derived hormones, or peptide-derived hormones. The hormones generated from lipid are lipid soluble. The hormones generated from peptides and amino acids are soluble in water. A hormone's target cells each have receptors that are unique to that hormone.The target cell can be reached by the lipid-derived hormones, which bind to the receptor protein and control its activity by crossing the plasma membrane. Hormones that are water soluble, however, cannot pass the plasma membrane. These hormones first attach to the receptor on the plasma membrane's surface.
With the aid of intracellular secondary messengers like cyclic AMP, this binding of a hormone with a membrane-bound receptor starts a cascade of secondary mechanisms within the cytoplasm of the cell. These auxiliary messengers deliver and control the signal to the target cell.
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plants are one of the primary sources of organic carbon, fixed nitrogen, and oxygen. explain the relationship of plants to organisms found in another kingdom (eg.,animalia, fungi, protista, bacteria). are there links between organisms in all the kingdoms? how does this underscore the importance of plants to us?
All other species on Earth are heterotrophic, meaning they rely directly or indirectly on green plants for nourishment. Green Sulphur bacteria are present in autotrophic microorganisms and green plants.
Why are plants important for us?Almost every terrestrial animal and human, including us, depends on plants for nourishment. We either eat plants or animals that eat plants. The atmosphere is preserved by plants. During the process of photosynthesis, they create oxygen and take in carbon dioxide. For all aerobic species, oxygen is necessary for cellular respiration.In biogeochemical cycles, plants recycle matter. For instance, plants transpire large amounts of water from the soil into the atmosphere.Numerous organisms have habitats thanks to plants.to know more about importance of plant please check the link given below:
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Give an example of a pair of species that exhibit each interaction listed in the table above.
A fox and a bobcat are vying for the same prey. An orca devouring a sea otter is predatory. A bison eating only plants: grazing in a prairie. A parasitoid wasp that lays its eggs on a caterpillar is known as a parasitist. Mutualism: A lichen is composed of a fungus and an alga. Commensalism can be seen in a connected remora, for instance. two things: a flowering plant and the animal that pollinates it.
Describe herbivory:Animals that consume plants are said to practice herbivory, and these creatures are known as herbivores. This connection induces adaptations in both the herbivore species and the plant species it eats, similar to predator-prey interactions.
What is an example of herbivory?The term "large herbivore" refers to creatures like cows, elk, and buffalo. These animals eat grass, bark from trees, aquatic plants, and new plant growth. Herbivores can also include medium-sized animals like sheep and goats that graze on grasses and shrubby plants. Small herbivores include mice, rabbits, chipmunks, and squirrels, for instance.
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Compare the roles of CO₂ and H₂O in respiration and photosynthesis.
Answer:
Cow is carbon dioxide and H²O is water
Explanation:
because trees need water and carbon dioxide
2017 baltzer evaluation of infraspinatus reinnervation and function following spinal accessory nerve to suprascapular nerve transfer in adult traumatic brachial plexus injuries.pdf
Baltzer's objective grow to be to decide the superiority and excellence of restored outdoor rotation in character brachial plexus damage sufferers who underwent spinal accessory nerve to suprascapular nerve switch and to understand affected person and harm factors that would affect results.
Despite the fact that EMG signs and symptoms and symptoms of recuperation, the SAN to SSN transfer did no longer provide useful recuperation of ER via reinnervation of the infraspinatus muscle in accidents regarding more stages than the suprascapular nerve. In patients with greater than level injuries, alternatives for SAN to SSN switch want to be taken into consideration to restore shoulder ER.
Our goal became to decide the superiority and wonderful of restored outside rotation in grownup brachial plexus damage (BPI) patients who underwent spinal accent nerve to suprascapular nerve transfer and to discover the affected man or woman and damage elements that would affect outcomes.
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In addition to its role in spinal reflex activity, the spinal cord also ________.
In addition to its role in spinal reflex activity, the spinal cord also contains sensory and motor tracts traveling to and from higher nervous centers.
What part of the spinal cord is involved in reflex action?The spinal cord recognises the impulse and immediately produces a reaction. When reflex actions occur, an instantaneous response is required. The spinal nerves regulate the many regions of the body's reflexes.
The head has to be stabilised by two reflexes. The cervicalocollic reflex and the vestibulocollic reflex control how the neck muscles contract in response to vestibular input and stretch receptors, respectively.
It ties your brain and lower back together. Your spinal cord relays nerve messages back and forth from your brain to your body. You can experience feelings and move your body thanks to these nerve transmissions.
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In a controlled experiment, researchers manipulate one variable at a time. What was the variable manipulated in this study? Why did the researchers use more than one hamster for each procedure? What traits of the individual hamsters would likely have been held constant among the treatment groups?
The variable that is manipulated in an experiment is called an independent variable.
What is an independent variable?Any attribute that can have varying values, including height, age, temperature, or diagnostic testing, is referred to be a variable in research. To assess the causality of links, researchers frequently modify or quantify dependent and independent variables in studies.
The cause is the independent variable. Its value is unaffected by other research factors.The effect is the dependent variable. Modifications in the independent variable affect its value.Therefore, the manipulated variable is called an independent variable.
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In a short essay (100-150 words), use specific examples to discuss the role of hormones in an animal's responses to changes in its environment.
The role of hormones in an animal's responses to changes in its environment is
The hormones that cause particular changes in animals in reaction to the external environment are melatonin, epinephrine, and norepinephrine.
Environment refers to the physical surroundings, including biotic variables interacting with living things like heat, water, and other natural resources like flora and fauna.The distinct environmental elements that are necessary for life include air, water, and life (the biosphere) (atmosphere). Climate, landforms, vegetation, and soil are a few examples of environmental physical features.Some of the abiotic (wind, temperature, soil composition, temperature, and humidity) and biotic (living things) elements that make up an ecosystem are habitats for animals (living things) that live there (plant matter, predators, and competitors).A multicellular eukaryote's body is made up of specialized tissues that enable the coordination and motion of its nerve and muscle tissue.Transport, nourishment, respiration, growth, reproduction, and excretion are a few examples of the life activities that animals depend on. Leg formation, organizational level, embryological development, body cavities, segmentation, and body symmetry are only a few examples of animal body characteristics.Temperature, growth, and reproduction are the three parameters that a chemical messenger, such as a hormone (an organic molecule released by plant and animal bodies), aids in regulating.Animals respond to changes in their environment in two unique ways: by scattering and adapting as a result of genetic alteration.A natural hormone called melatonin that is released at night to encourage sleep is affected by environmental factors like temperature or climate change; melatonin secretion increases throughout the winter because of the longer nights.In reaction to high breathing rate, stress, and elevated heart rate, adrenaline and norepinephrine are released.
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Q.1. What types of substance have pH values less than 7?
Q.2. What types of substance have pH values greater than 7?
Answer:
AcidicAlkalineExplanation:
pH is determined by the H+ concentration, lower the value of pH more acidic the substance is. And higher the value of pH, it inclines towards being alkaline I nature.
Interpret the Data
A correlation is a way to describe the relationship between two variables. In a positive correlation, as the values of one of the variables increase, the values of the second variable also increase. In a negative correlation, as the values of one of the variables increase, the values of the second variable decrease. Or there may be no correlation between two variables. If researchers know how two variables are correlated, they can make a prediction about one variable based on what they know about the other variable.
(c) Which show(s) no clear relationship?
The variables that are positively correlated with the volume of nectar production are;
Nectar concentrationSeeds per flowerVisits per flowerWhat is a correlation?The correlation is a way that we show the relationship between variables. If we are studying the correlation between variables, we are trying to find out how one variable affects another.
Now, a positive correlation exists between variable leads to an increase in another variable. A negative correlation occur when the increase in one variable leads to a decrease in another variable.
Hence, the variables that are positively correlated with the volume of nectar production are;
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Why does one receptor have so many different signal transduction proteins/pathways?
The cell may need to react by undergoing a lot of modifications (short-term and long-term). Different signal transduction proteins guarantee the signal's amplification and the emergence of a variety of responses (if necessary).
What is the function of protein molecules in cell?to make it easier for molecules to be transported into or out of cells passively or actively. Metabotropic receptors that support other cell processes or metabolic cascades.What is protein molecules?These amino acids are arranged in a long chain and joined to one another by covalent peptide bonds to form proteins. Polypeptides are another name for proteins. The sequence of amino acids in every type of protein is distinct and identical from one molecule to the next. There are countless varieties of proteins, each with a unique amino acid sequence.
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what two 2 ways bacteria cause illness?
Answer:
by secreting or excreting toxins (as in botulism), by producing toxins internally, which are released when the bacteria disintegrate (as in typhoid), or by inducing sensitivity to their antigenic properties
Explanation:
Benefits of Microscopes
3. Consider the technology behind each type of microscope. Why can light microscopes produce images in their natural color, while scanning electron and transmission electron microscopes only produce grayscale images?
due by tomorrow.
Answer:
They are useful in number of ways
Explanation:
They magnifies on every object . They are 1000 times better than lines. They can magnify an object about 10000 or more than that depending on microscopes.There are many types of microscopes.
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Pepsin is resistant to the denaturing effect of the low pH environment of the stomach. Thinking about the different digestive processes that occur in the small intestine, describe an adaptation shared by the digestive enzymes in that compartment.
The digestive enzymes in the small intestine must be resistant to enzymatic cleavage other than the cleavage required to activate them since enzymes are proteins and proteins are hydrolyzed there.
Describe protein digestion.Protein digestion begins when you first start chewing. Amylase and lipase are two of the enzymes found in saliva. They mainly break down lipids and carbohydrates.Once a protein source reaches your stomach, hydrochloric acid and proteases enzymes break it down into smaller chains of amino acids. Amino acids are joined by peptides, which are broken down by proteases.Your stomach sends these shorter amino acid chains to your small intestine. At this time, your pancreas also releases a bicarbonate buffer to reduce the acidity of the food being digested as well as enzymes.More enzymes can now continue breaking down long amino acid chains into their constituent amino acids because to the decrease in their workload.Learn more about the protein digestion with the help of the given link:
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Researchers are interested in studying the impact of drugs on human fetuses. In this case, why would a correlational study be more appropriate than an experiment?.
If researchers are interested in studying the impact of drugs then a correlational study is more appropriate than an experiment because individuals cannot be used under experimental conditions.
What is a correlational study?A correlational study is an investigation in which a given sample (e.g.. model animals) is used as a replacement and outcomes are associated with the target group.
In conclusion, if researchers are interested in studying the impact of drugs on human fetuses, then a correlational study is more appropriate than an experiment because individuals cannot be used under experimental conditions.
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What are characteristics of the pedigrees of families with mitochondrial diseases?
Mitochondrial genes are solely passed down from the mother, as opposed to nuclear genes, that are acquired from both parents. Males will not carry that on, but females will carry it on to all of their offspring, and so on, if there is a variation in such a mitochondrial gene, it is carried from a mother to all of the offspring.
Mitochondrial genes- The circular chromosome known as mitochondrial DNA may be discovered within the cellular organelles known as mitochondria. The mitochondria, which are found in the cytoplasm, are where the cell produces energy and performs other metabolic tasks. Children receive mitochondria from their mother, and as a result, mitochondrial DNA.
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which individual compared r rna sequences to generate the tree of life, establishing the three-domain system? group of answer choices robert hooke frederick griffith robert koch carl woese
Carl Woese compared r rna sequences to generate the tree of life, establishing the three-domain system.
Three Domain System is a biological classification brought by Carl Woese in 1977 that splits cellular life forms into archaea, bacteria, and eukaryote domains.Archaea is Otherwise known as archaebacteria, contains unicellular prokaryotic organisms that lives in harsh climates. Ancient Do not contain peptidoglycan in cell wall.Bacteria is Otherwise known as bacterium, contains unicellular, prokaryotic organisms which Includes common bacteria and those that cause disease and Contains peptidoglycan in cell wall.Eukaryote Includes animals, plants, fungi, and protists.Basis of Three Domain System is the Sequence of nucleic acids in RNA (makes up ribosomes - produce proteins)To know more about Three Domain System visit : https://brainly.com/question/26344149
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Identify which of the following, if any, are unique to mammals: a female uterus, a male vas deferens, extended internal development, and parental care of newborns.
None of these given in question are unique to mammals
characteristics of mammals are from Class of endothermic vertebrates, Have four limbs and produce amniotic eggs, Defined by the presence of mammary glands and hair (or fur), Sweat glands in their skin, Alveoli in their lungs, A four-chambered heart, A brain covering called the neocortex and have four different types of teeth.Two characteristics that distinguish members of class Mammalia from other vertebrate animals are hair and mammary glands.Mammary glands produce and secrete milk that nourishes developing young.A system of glands or groups of cells that secrete fluid to be used elsewhere in the body which helps to regulate a mammal's internal environment.Sweat glands control body temperature; mammary glands produce milkTo know more about mammals visit : https://brainly.com/question/15326492
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How do cells use energy?
a, biosynthesis of more complex molecules
b. atp hydrolysis
c. cellular movement
d. active transport
Cells use energy in the following processes: a.biosynthesis of more complex molecules, c. cellular movement, and d. active transport
The biosynthesis of more complex molecules is an anabolic process. An anabolic process can be described as a process in which energy is required. For the synthesis of complex molecules, energy is derived from the nutrients that we take. Hence, biosynthesis of more complex molecules requires energy.
Any type of cellular movement that occurs against the concentration gradient requires energy. Hence, cells use energy for cellular movement.
We can describe active transport as a process in which molecules move across the cell membrane against the concentration gradient i.e from a region of lower concentration to a region of higher concentration. Hence, cells also use energy for active transport.
The process of hydrolysis, however, does not require energy. ATP hydrolysis yields energy, it does not use energy. Water is used to break down ATP to yield energy from the process of ATP hydrolysis.
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an embryo has just passed the sixth week of development. the skin, nails, and hair are developing on a layer of the embryonic disk. which layer is described?
Typically, the ectoderm divides into neural and epithelial components (spinal cord, peripheral nerves and brain). This comprises the enamel of the teeth, as well as the skin, linings of the mouth, anus, nostrils, sweat glands, hair, and nails.
What is ectoderm layer?One of the three basic germ layers created during the early stages of embryonic development is the ectoderm.
It is the top layer and lies close to the endoderm and mesoderm (the middle layer) (the innermost layer). It comes from the outermost layer of germ cells and has that origin.
The embryo develops three “germ layers” in week sixth, from which all tissues and organs will eventually emerge: The development of the nervous system, skin, hair, and nails begins at the ectoderm layer.
Therefore, ectoderm layer in an embryo responsible for development of The skin, nails, and hair.
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black fur and black eyes black fur and red eyes white fur and black eyes white fur and red eyes predicted fraction /16 /16 /16 /16
The expected fractions are 4/16 Black Fur, Black Eyes – 4/16 Black Fur, Red Eyes – 4/16 White Fur, Black Eyes – 4/16 White Fur, Red Eyes, assuming diallelic genes, exhibiting total dominance, and not interacting.
Data readily available:
The fur color and eye color of each individual are combined in this cross.
Over white fur, black fur is more prevalent.
Over red eyes, black eyes are more prevalent.
The two parents involved in the cross are dihybrid and homozygous recessive.
What conclusions are we able to draw from this data?The following genotypes and phenotypes are suggested based on the supposition that diallelic genes exist for each attribute, that these genes exhibit total dominance, and that no gene interactions exist.The fundamental physical and functional unit of heredity is a gene. DNA constitutes genes. Some genes serve as instructions for producing molecules known as proteins. Many genes, however, do not code for proteins. From a few hundred DNA bases to more than 2 million bases, human genes can range in size.To know more about diallelic genes, refer to the following link:
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Some cells lining tubules in the kidney maintain normal cell volume by synthesizing organic solutes. Where in the kidney would you expect to find these cells? Explain.
The synthesizing organic solutes. Where in the kidney would you expect to find these cells are-
The kidney is the body's excretory organ, which aids in eliminating waste products from the body as well as regulating osmolality and preserving the body's water balance.
The glomerulus, proximal convoluted tubule, loop of Henle (descending duct, ascending duct), distal convoluted tubule, and collecting duct make up the nephron, which is the kidney's functional unit. Water, glucose, sodium chloride, amino acids, and other beneficial compounds are reabsorbed from the tubule while waste products including urea, creatinine, and uric acid are released out of the body through urine.
The epithelial cells that line the kidney's tubules aid in the maintenance of water and ionic balance, preserving the kidney's cell volume.
Reabsorbed substances from the proximal convoluted tubuleDistal convoluted tubule and collecting duct become permeable to water in the presence of anti-diuretic hormone, causing reabsorption of water and final concentration of urine.
P cells and I cells are the two types of cells found in the distal convoluted tubule and collecting duct, respectively.
The collecting duct's principal (P) cells are in charge of the ADH-induced water reabsorption process.
Hydrogen and bicarbonate ions are handled by intercalated or I cells.
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Which of the following statements BEST describes an inorganic compound?
a compound containing carbon that is important to the survival of living systems
a compound containing oxygen that is important to the growth of living systems
a compound without molecules containing carbon
a compound that provides structure and affects the function of a cell
The first step in tissue repair involves ________. inflammation replacement of destroyed tissue by the same kind of cells formation of scar tissue proliferation of fibrous connective tissue
The first step in tissue repair involves the inflammation of the tissue and concomitant response (Option a is correct).
What is an inflammatory immune response?The inflammatory immune response is a type of response of the immune systems aimed at isolating pahtogenic agents such as viruses and bacteria that otherwise might spread across the body.
In conclusion, the first step in tissue repair involves the inflammation of the tissue and concomitant response (Option a is correct).
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Red blood cells add a(n)? group to any entering glucose molecule, which prevents the glucose from passing back across the membrane. listen to the complete question
Red blood cells add a phosphate group to any entering glucose molecule, which prevents the glucose from passing back across the membrane.
Red blood cells, additionally called red cells, pink blood corpuscles, haematids, erythroid cells or erythrocytes, are the maximum common form of blood mobile and the vertebrate's foremost way of handing over oxygen to the body tissues through blood go with the go with the flow via the circulatory system. pink blood cells supply oxygen from our lungs to the relaxation of our our bodies. Then they make the pass again journey, taking carbon dioxide lower back to our lungs to be exhaled.
A low RBC rely wide variety, also referred to as anemia, can have an effect on the body's potential to transport oxygen and vitamins across the cardiovascular system. it could purpose fatigue, dizziness, and coronary heart palpitations. The maximum common shape of anemia is iron deficiency anemia. this will end result from blood loss, malnutrition, or kidney troubles.
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is the bond stronger between atoms in hydrogen or nitrogen gas? why?
this is science pls hurry
The bond strength between atoms in hydrogen gas is stronger than between atoms in nitrogen gas.
What is bond strength?Bond strength is the measure of the strength of a chemical bond, which is the attraction between two atoms or molecules. It is usually expressed in terms of energy, with stronger bonds having higher energies. The strength of a bond is determined by its bond order, the type of atoms forming the bond, the hybridization of the orbitals involved, and the presence of any atoms or groups of atoms in the vicinity of the bond.
This is because hydrogen atoms form covalent bonds, which are much stronger than the van der Waals forces that hold nitrogen atoms together. Covalent bonds are formed when two atoms share electrons, while van der Waals forces are weak attractions between molecules. The stronger bond in hydrogen gas makes it more likely for the atoms to stay together, while nitrogen atoms are more likely to break apart.
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indirect effect of oxygen on kelp
The reduction of a shared competitor by one species can have a positive impact on another, which is known as indirect facilitation. Understory algae, which fight with sessile invertebrates for space in large kelp forests, suffer from shade from the giant kelp, Macrocystis pyrifera.
This suggests that enormous kelp may indirectly benefit sessile invertebrates by squelching understory algae.
The results of the trials showed that gigantic kelp had a detrimental impact on light availability and understory algae abundance while having a beneficial impact on the abundance of sessile invertebrates, which was consistent with an indirect effect mediated by kelp canopy shade.
Over an eight-year period, 16 locations on natural reefs off Santa Barbara, California, investigated the significance of these mechanisms to temporal variability in benthic community structure. Interannual variability in the quantity of giant kelp was strongly and favourably correlated with interannual variability in the number of understory algae and sessile invertebrates.
The size of the indirect influence of giant kelp on invertebrates was six times greater than the direct effect on invertebrates, according to an analysis of these observational data using structural equation modelling (SEM). According to the results, this system's dynamics are driven by variation in the abundance of a single species that builds structures, which has both direct and indirect effects on the species it associates.
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The rough endoplasmic reticulum is:
an intracellular double-membrane system to which ribosomes are attached
an intracellular membrane that is studded with microtubular structures
a membranous structure found within mitochondria
only found in prokaryotic cells
The rough endoplasmic reticulum is an intracellular double-membrane system to which ribosomes are attached. So the first option is the correct answer.
Endoplasmic reticulum is a continuous network of membranous tubules that runs through the cytoplasm of a eukaryotic cell. The cytoplasmic endoplasmic reticulum extends from the nuclear membrane. The endoplasmic reticulum, which is the biggest organelle in the majority of eukaryotic cells, is completely encircled by a continuous membrane.It participates in the production of proteins and lipids and typically contains ribosomes attached.There are mainly two types of endoplasmic reticulum:1. Smooth Endoplasmic Reticulum (SER)
2. Rough Endoplasmic Reticulum (RER)
Rough endoplasmic reticulum contains ribosome in theire outer membrane and smooth endoplasmic reticulum does not contain ribosome.Based on the presence of endoplasmic reticulum they are named smooth and rough.
So, the first option is the correct answer.The rough endoplasmic reticulum is an intracellular double-membrane system to which ribosomes are attached.
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In 2011 , the United States had a population of 311 million people. If there were 14 births and 8 deaths per 1,000 people, what was the country's net population growth that year (ignoring immigration and emigration)? What would you need to know to determine whether the population of the United States is currently experiencing exponential growth?
Net population growth is 1.87 million.
Equation :In given statement If there were 14 births and 8 deaths per 1,000 people the country's net population growth that year
ΔN/Δt = bN - dN
annual per capita birth rate,
b = 14 / 1000 = 0.014
annual per capita death rate,
d = 8 / 1000 = 0.008
Net population growth =
(0.014 x 311,000,000) - (0.008 x 311,000,000)
= 1.87 million
You must ascertain whether the immediate rate exceeds 0 and if it is stable over time in order to assess whether the population is expanding exponentially.
What is net population growth ?After subtracting deaths and births, the percentage growth is known as the net reproductive rate (r). The population reproduction rate in the aforementioned scenario is 0.5% per year. Net reproductive rate (r) can be calculated as follows: r = (births-deaths)/population size, or you can multiply by 100 to get the result in percentage terms.
What does net change in population mean ?Net migration is defined as the difference between people entering into an area and those leaving the same area. The annual rate of net migration measures how quickly population sizes vary.
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