heart rate and stroke volume decrease under decreased parasympathetic stimulation.truefalse
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Heart rate and stroke volume decrease under decreased parasympathetic stimulation is True.
When the parasympathetic nervous system is stimulated, the heart rate decreases and the stroke volume increases. This is because the parasympathetic nervous system stimulates the release of the neurotransmitter acetylcholine, which binds to muscarinic receptors on the sinoatrial node of the heart, causing a decrease in the heart rate and an increase in the stroke volume. The decrease in heart rate is due to a decrease in the release of excitatory neurotransmitters, such as epinephrine and norepinephrine, which stimulate the heart rate. The increase in stroke volume is due to the increased relaxation of the atrioventricular valves, which allow more blood to be pumped out of the heart with each beat.
Parasympathetic stimulation is responsible for slowing the heart rate and increasing the stroke volume of the heart. When parasympathetic stimulation is decreased, both the heart rate and the stroke volume decrease. This can be seen in cases of increased sympathetic stimulation, such as during exercise or periods of stress. During these times, the heart rate increases and the stroke volume decreases as the parasympathetic system is inhibited.
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Related Questions
what is the history of some interesting statistical analyses that were developed for biological questions
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Some interesting statistical analyses that were developed for biological questions include ANOVA, chi-square tests, regression analysis, and principal component analysis.
Statistics play a vital role in many areas of biology, including genetics, ecology, and evolutionary biology. Researchers have developed a variety of statistical methods to analyze biological data. One of the most commonly used methods is ANOVA (analysis of variance), which is used to determine if there are significant differences between groups.
Chi-square tests are another commonly used statistical method in biology, which are used to determine if there is a significant difference between observed and expected data. Regression analysis is used to determine the relationship between two or more variables, while principal component analysis is used to identify patterns in large data sets. Other interesting statistical analyses developed for biological questions include logistic regression, survival analysis, and meta-analysis.
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naloxone, nalorphine, and naltrexone are examples of
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Naloxone, nalorphine, and naltrexone are examples of opioid receptor antagonists. Opioid receptors are proteins found in the central nervous system and other tissues that mediate the effects of opioids, which include pain relief and euphoria.
These antagonists bind to the opioid receptors, blocking their activation by opioid drugs or endogenous opioids.
Naloxone is commonly used as an emergency treatment for opioid overdose. It rapidly binds to opioid receptors, displacing other opioids and reversing the effects of respiratory depression and sedation caused by opioid overdose.
Nalorphine is another opioid receptor antagonist that was historically used to treat opioid dependence and relieve pain. However, its use has been largely discontinued due to its potential for inducing withdrawal symptoms.
Naltrexone is used to manage opioid dependence and alcohol dependence. It blocks the effects of opioids and reduces cravings, helping individuals overcome addiction.
Overall, these opioid receptor antagonists play a crucial role in the treatment of opioid overdose and addiction by reversing the effects of opioids and blocking their action on receptors.
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specialized lymphatic capillaries called lacteals are specialized lymphatic capillaries called lacteals are located primarily in the large intestine. more numerous than blood capillaries. located throughout the body. part of the fenestrated capillary group. necessary for the transport of dietary lipids.
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Specialized lymphatic capillaries called lacteals are located primarily in the small intestine. These lymphatic capillaries called lacteals are necessary for the transport of dietary lipids. Lacteals are located in the villi and are a part of the lymphatic system. These lymphatic capillaries called lacteals are necessary for the transport of dietary lipids.
They are more numerous than blood capillaries. The digestion of lipids takes place in the small intestine with the help of bile secreted by the liver and stored in the gallbladder. These fats are broken down into tiny particles called micelles, which can be absorbed by the intestinal walls. After the lipids have been absorbed, they enter the lacteals, which then transport them to the lymphatic system. This is because dietary lipids are not water-soluble, which means they cannot be transported by blood. The lymphatic system is responsible for the transportation of large molecules that cannot be transported by blood, such as lipids. The lacteals are located in the villi of the small intestine, which are finger-like projections that line the small intestine. They are specialized lymphatic capillaries that are responsible for the transportation of dietary lipids. These lacteals are more numerous than blood capillaries, which highlights the importance of their function.
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Immediately after an action potential passes along an axon, it is not possible to generate a second action potential. Thus, we state that the membrane is briefly _____.O refractoryO myelinated neuronsO exocytosisO potassium ions
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Immediately after an action potential passes along an axon, it is not possible to generate a second action potential. Thus, we state that the membrane is briefly refractory
What is refractory?Refractory is a material that is highly resistant to heat, wear, and corrosion. It is commonly used in applications such as lining furnaces, kilns, incinerators, and other high temperature systems. Refractory materials are also used to insulate against extreme temperatures and protect against fire. Refractory materials typically have a high melting point, thermal conductivity, and chemical stability.
This ensures that one action potential is not confused with two, and that an action potential is propagated in a single direction. Myelinated neurons help to increase the speed of action potential propagation, but do not affect the refractory period. Exocytosis and potassium ions are both involved in the generation of action potentials.
Therefore, the correct option is A.
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ostriches and giraffes are both native to the savannahs of africa. they share the same characteristic of a very long neck, this is an example of ___
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Ostriches and giraffes are both native to the savannahs of Africa. They share the same characteristic of a very long neck, is an example of convergent evolution.
Convergent evolution is the process by which unrelated or distantly related organisms evolve similar body structures, adaptations, or characteristics in response to similar ecological conditions, selective pressures, or challenges. It happens when organisms in separate environments face the same selective pressures and evolve similar body structures or functions to increase their chances of survival and reproduction.
Convergent evolution typically results in analogous structures in different species that serve the same or similar functions, such as wings in birds and insects or fins in dolphins and fish. In this case, ostriches and giraffes have a similar neck structure, which they both developed separately to aid in the survival in the African savannahs. Ostriches have long necks that help them reach the ground to eat, while giraffes have long necks that help them reach tall trees for food.
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Construct an explanation based on evidence for how the theory of evolution explains why and how populations of organisms change over time. Be sure to include the role that these four factors have on evolution: overproduction, genetic variation, competition, and natural selection.
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The theory of evolution is a scientific explanation for the changes in populations of organisms over time.
What is Genetic variation?
Genetic variation refers to the diversity of genetic material within a population or among different populations of the same species. It is the result of mutations, genetic recombination, and other genetic processes that create differences in DNA sequences and the expression of genes.
Genetic variation can occur at different levels, including the nucleotide level (where differences occur in the sequence of DNA bases), the gene level (where differences occur in the expression of genes), and the chromosomal level (where differences occur in the structure or number of chromosomes).
It states that all living things share a common ancestor and that over time, populations of organisms can evolve and diversify into new species.
One of the primary drivers of evolution is overproduction. Organisms produce more offspring than can survive, leading to competition for resources such as food, water, and shelter. This competition leads to natural selection, where those organisms with advantageous traits are more likely to survive and reproduce.
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The nuclei of both 3h and 3he have radii of 1. 5×10^−15m. With what velocity must the electron be ejected if it is to escape from the nucleus and not fall back?.
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The velocity with which the electron must be ejected to escape from the nucleus and not fall back is 8.21067 x 10^8 m/s.
How the electron of the nucleus and with what velocity it must move to not fall back?According to the question provided, we know that 3H and 3E ( radii = 1.5 x 10^-15m) .We use the concept of escape velocity.Kinetic energy, K.E. = 1/2 mv^2 = P.E.1/4piEo x q1xq2/r = K xq1 xq2/r Equating the both we get 1/2mv^2v= sqrt ( 1/pi x Eo)(e^2/mxr)v=sqrt(1/pix8.85x10^-12)(1.602x10^-19)(9.11x10^-31x1.5x10^-15m)v=8.21067x10^8 m/s.To know more about Nuclei and velocity visit:
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Grasses are the dominant producers in the prairie ecosystem. Mice eat the grass seeds, snakes eat the mice, and hawks eat the snakes. The mass of a hawk is around 500 grams. In this ecosystem, how many hawks can be supported by 250,000 kilograms of producers
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According to the given information, can be supported by 250,000 kilograms of producers is 500.
What is a decomposer an example?Examples of decomposers are fungi and bacteria that obtain their nutrients from a dead flora or fauna material.
They break down the cells of dead organisms into simpler substances, which become organic nutrients available to the ecosystem.
Thus, The mass of a hawk is around 500 grams, can be supported by 250,000 kilograms of producers is 500.
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the template dna strand reads gcatacgtagctgagtcccgaactc. this sequence is also provided on the protein synthesis worksheet page. choose the complementary dna strand.
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The complementary DNA strand for the template DNA strand gcatacgtagctgagtcccgaactc is cgattgcatcgactcagggcttgag.
The DNA molecule consists of two strands that are complementary to each other, with the bases on one strand pairing specifically with their complementary bases on the other strand.
In DNA, adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G). This pairing is known as base pairing.
This is because the base pairs in DNA always match up in a specific way: A (adenine) pairs with T (thymine) and C (cytosine) pairs with G (guanine).
Therefore, to find the complementary DNA strand, we simply replace each base with its complement: G becomes C, C becomes G, A becomes T, and T becomes A.
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The template DNA strand reads GCATACGTAGCTGAGTCCCGAACTC. Nucleotides numbered 10-18 represent an intron. This sequence is also provided on the protein synthesis worksheet page. Choose the tRNA anticodons that match the mRNA codons. Only select codons that will be used in translation. it of Select one: O a. GCUGAGUCC O b. GCAUACGUAUCCCGAACU O C. AUGCAUGCUUGAG O d. UACGUACGAACU O e. UACGUAGCUGAGUCCCGAACU
which part of the dna nucleotide contains the genetic code to make the protein?
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The piece of the nucleotide that stows inborn data is the nitrogen base. There are five real bases to be clear adenine, guanine, cytosine, thymine, and uracil.
The setup of these bases in DNA or RNA decides the inborn data in the particle. Hereditary code is the arrangement of nucleotides in deoxyribonucleic corrosive (DNA) and ribonucleic corrosive (RNA) that decides the amino corrosive succession of proteins. However the straight arrangement of nucleotides in DNA contains the data for protein successions, proteins are not made straightforwardly from DNA.
DNA is organized as a twofold helix and is generally situated in the cell core. DNA replication additionally happens inside the cell core. Proteins are enormous particles comprised of at least one long arrangement of amino acids.
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A male with the condition has four children with a female who is a carrier. What are the expected genotypic and phenotypic ratios of the offspring? Include a Punnett square to support your answer.
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Genotypic ratio: 1:1 (Aa: aa): half affected and half carriers. phenotypic ratio: 1:1 (carrier: affected) - Carriers and affected individuals make up equal numbers.
What are the expected genotypic and phenotypic ratios of the offspring?We ought to take into consideration the inheritance pattern of the condition as well as the genotypes of the guardians in arrange to expect the genotypic and phenotypic ratios of the sibling.
The male with the condition would have the genotype "aa," and the female with the condition would have the genotype "Aa," in the event that the condition could be a latent hereditary clutter.
We can cross the male genotype (aa) with the female genotype (Aa) using a Punnett square:
| A | a | ------------ A | aa | aa | ------------
From the Punnett square, we can observe the following:
chromosomal ratio:
The genotype "Aa" (carriers) is expected to be present in two out of four offspring, or fifty percent.
The genotype "aa" (affected by the condition) is expected to be present in two out of four offspring (50 percent).
phenotypic Ratio :
It is anticipated that two out of four offspring, or 50%, will be carriers (phenotypically unaffected).
2 out of 4 (half) posterity are supposed to be impacted by the condition.
As a result, the anticipated genotypic ratio is one-to-one (Aa: aa), and the anticipated ratio of phenotypes is also 1:1 (carrier: affected).
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in which cell does a graded potential occur? in which cell does a graded potential occur? adipocytes epithelial cells neurons it occurs in all the cell types listed.
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It occurs in all the cell types listed. These transient membrane potential changes are called graded potentials, and they tend to occur in the dendrites of the neuron and in the soma of the neuron.
What is graded potential ?It depends on the charge of the ions in motion whether a depolarization or a hyperpolarization action occurs. This localised voltage shift, sometimes referred to as a graded potential or localised potential, has an inverse relationship with the stimulus intensity in terms of its amplitude.
Graded potentials have amplitudes that are related to the amount of the input stimulus and can be depolarizing or hyperpolarizing. They are integrable in both space and time and move passively and equally in all directions.A graded potential is produced when a ligand opens a ligand-gated channel in the dendrites, allowing ions to enter (or exit) the cell. For instance, Na+ will enter the cell and K+ will exit until they both reach equilibrium.Learn more about Graded potential here:
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Humus is:
1)the artificial fertilizer applied to monocultures
2)composed of organic compounds and increases the water-holding capacity of soils
3)one of the primary causes of desertification if present in excess
4) promotes eutrophication when agricultural practices allow it to get into waterways
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Answer:
Humus is composed of organic compounds and increases the water - holding capacity of toys
Fertilization involves what 2 cells uniting to form a new human being?.
Answers
Answer:
sperm cell and egg cell are the awnsers
Dennis is a laboratory researcher who studies reproductive physiology. As part of his research, he works with radioactive antibodies that allow him to specifically target and destroy LH and FSH receptors in the testes of mammals. Unfortunately, Dennis isn't very conscientious when it comes to laboratory safety and has repeatedly ignored warnings not to eat or drink while in the lab. One day while performing one of his experiments he inadvertently spilled one of the radioactive compounds into the Mountain Dew he was consuming. Indicate what would happen to Dennis under the following circumstances:
A. If Dennis consumed Mountain Dew spiked with the radioactive antibodies that specifically destroy LH receptors in the testes so that they could no longer respond to LH, how would the following factors change (increase/decrease/no change)?Explain each of your answers.
Sperm production _____________
Testosterone ______________
Inhibin ______________
LH ______________
FSH ______________
GnRH ______________
B. If Dennis consumed Mountain Dew spiked with the radioactive antibodies that specifically destroy FSH receptors in the testes so that they could no longer respond to FSH, how would the following factors change (increase/decrease/no change)? Explain each of your answers
Sperm production _____________
Testosterone ______________
Inhibin ______________
LH ______________
FSH ______________
GnRH ______________
Answers
As the researcher Dennis consumed Mountain Dew spiked with the radioactive antibodies that specifically destroy LH receptors, the following factors would change: Sperm production would decrease, Testosterone would decrease, Inhibin would decrease, LH would increase, FSH would decrease and GnRH would increase. These changes are due to the role of LH receptors in the testes which are responsible for producing testosterone, the hormone that drives spermatogenesis.
Here's how the changes occur:1. Sperm production: Sperm production is regulated by the pituitary hormone FSH (Follicle-stimulating hormone) and testosterone, both of which are regulated by LH receptors. As LH receptors are destroyed, testosterone levels decrease, which in turn results in decreased sperm production.2. Testosterone: LH receptors in the testes stimulate Leydig cells to produce testosterone.
If these receptors are destroyed, testosterone levels will decrease.3. Inhibin: Inhibin is produced by the Sertoli cells of the testes. The production of inhibin is regulated by FSH, which is indirectly regulated by LH receptors. As the levels of FSH decrease due to destroyed FSH receptors, the levels of inhibin would also decrease.4. LH: LH receptors in the testes stimulate the Leydig cells to produce testosterone.
As these receptors are destroyed, the levels of LH would increase in an attempt to stimulate testosterone production.5. FSH: FSH regulates the production of inhibin, which indirectly regulates sperm production. As the FSH receptors in the testes are destroyed, the levels of FSH would decrease.6. GnRH: GnRH is the hormone that regulates the release of LH and FSH from the pituitary gland.
As LH levels decrease, the levels of GnRH would increase to try and stimulate the production of LH. On the other hand, if the researcher consumed Mountain Dew spiked with the radioactive antibodies that specifically destroy FSH receptors, the following factors would change:Sperm production would decrease, Testosterone would decrease, Inhibin would increase, LH would increase, FSH would decrease and GnRH would increase.
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How many atoms are there in a 2 moles of oxygen atoms? how many atoms are there in 2 moles of oxygen molecules? group of answer choices.
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The number of atoms in 2 moles of oxygen atoms is 1.204 x 10²⁴.
One mole of an element is the number of atoms contained in a substance which totals 6.02 x 10²³ atoms or is the gram weight of the element which is equal to its relative atomic mass (Ar). If there are 2 moles of O₂ atoms then the number of atoms is
Number of atoms = n x L
The number of atoms of O₂ = n x L
The number of atoms of O₂ = 2 x 6.02 x 10²³
The number of atoms of O₂ = 12.044 x 10²³ atoms
The number of atoms of O₂ = 1.204 x 10²⁴ atoms
So, the number of atoms of 2 moles is 1.204 x 10²⁴.
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Why is it not easy to replace a link in a food chain?
There are not enough animals to replace the previous organism.
The decomposers will not decompose another type of organisms.
There are not enough plants to replace the previous organisms.
There may be limited type of natural predators organisms may have.
Answers
Answer: D
Explanation: Everything in the food chain is there for a reason. Removing one thing could ruin the whole ecosystem
there is mounting empirical evidence that infrared heat provides special assistance to flush the body of toxins. true false question. true false
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The statement "there is mounting empirical evidence that infrared heat therapy provides special assistance to flush the body of toxins. true false question." is True.
There is growing scientific evidence that suggests that infrared heat therapy can help flush the body of toxins. Infrared heat is a type of radiant heat that is absorbed directly by the body's tissues and organs, causing them to vibrate and produce heat.
One of the ways that infrared heat therapy helps to flush toxins from the body is by increasing circulation. As the body's temperature rises, blood vessels dilate, allowing more blood to flow through the body. This increased circulation helps to carry waste products and toxins away from the organs and tissues and out of the body.
In addition, infrared heat therapy can help to stimulate the body's sweat glands, which can also help to eliminate toxins from the body. Sweating is one of the body's natural detoxification mechanisms, and the increased sweating that occurs during infrared heat therapy can help to flush out toxins through the skin.
Overall, there is mounting evidence that infrared heat therapy can be a valuable tool for detoxification and improving overall health. However, it is important to note that more research is needed to fully understand the mechanisms behind this effect and to determine the optimal duration and frequency of infrared heat therapy for maximum bene
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Which of the following sets of terms lists the structures from smallest to largest?
A) nucleic acids, nucleotides, chromosomes, genes
B) nucleotides, nucleic acids, genes, chromosomes
C) chromosomes, genes, nucleic acids, nucleotides
D) genes, nucleotides, chromosomes, nucleic acids
Answers
Answer:
maybe its C
im sorry if im wrong
which statement about life on earth is true?
a. dinosaurs appeared before insects.
b. dinosaurs and insects appeared at the same time.
c. humans have been on earth for hundreds of millions of years.
d. humans have been on earth for a very short sling of time.
Answers
Answer:
c.hu!and have been on Earth for hundreds of years
Explanation:
just feels right
which measurement unit represent volume?
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Answer:
Volume is the measure of the amount of space occupied by an object. The standard SI unit of volume is defined by the base unit of length (Figure 3). The standard volume is a cubic meter (m3), a cube with an edge length of exactly one meter.
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Would you consider a soft drink to be high in carbohydrates?
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A soft drink is considered to be high in carbohydrates as it contains about 1-12% of the carbohydrate content. Only the zero-calorie products have low carbohydrate content.
What are carbohydrates?Carbohydrates are the biomolecules which are also called as sugars. These are made up of carbon, hydrogen, and oxygen elements. Carbohydrates are the primary source of energy which are broken down through cellular respiration to produce energy in the form of ATP.
The sugar content of soft drinks varies in the range between 1% to 12%. Glucose, sucrose, or fructose are generally added to the soft drinks as a natural carbohydrate sweetener. Sucrose is a disaccharide, made up of glucose and fructose molecules.
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the atomic number of an element is equal to the
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Answer:
It equals the number of protons and electrons.
Explanation:
a reasonable harvest quota group of answer choices will be around 74% of the current population will account for cheaters and poachers will leave the species at or just below carrying capacity all of the answers
Answers
A reasonable harvest quota would be one that takes into account several factors. Firstly, it should aim to maintain a sustainable population of the species in question.
This means that the harvest should not exceed the carrying capacity of the environment. Secondly, the quota should consider the potential impact of cheaters and poachers, who may illegally take more than the allocated amount. To account for this, the quota should be set lower than the carrying capacity, ideally around 74% of the current population. This would leave a buffer zone to mitigate the effects of poaching and cheating and ensure that the population remains stable.
In summary, a reasonable harvest quota should be based on the carrying capacity of the environment, the potential impact of illegal hunting, and the current population size, with a target of around 74% to account for cheaters and poachers.
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Give me one example of how people use graphs in the real world,
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Answer:
By wealth, or how much profit people make in a business
Explanation:
Sometimes this is in movies, but in the real world this is essential so they can keep track of profits and customer services
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A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts.
What type of cell is the student most likely viewing?
Choose 1 answer:
(Choice A) Plant cell
(Choice B) Fungal cell
(Choice C) Bacteria
(Choice D) Animal cell
Answers
Answer:
The student is most likely viewing a (A) plant cell
Explanation:
All cells have a nucleus, but only green plants contain chloroplasts.
A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts,it was a Plant cell .
What is a Plant cell?A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts,it was a Plant cell .What is a Plant cell?Plant cells can harness the energy of the Sun, store it in the chemical bonds of sugar and later use this energy. The organelle which is responsible for this is the chloroplast. Chloroplasts contain chlorophyll, the green pigment that gives leaves their colour and absorbs light energy.Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection.To learn more about Plant cell refer:https://brainly.com/question/13206365
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differenciate between larva of culex and that of anopheles on the basis of feeding habit
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Answer:
Answers in the image.
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the gene for enzyme transposase is carried by
Answers
Answer:
The gene for enzyme transposase is carried by a plasmid.
what is an euglena draw and label it
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How could a change in the number of primary consumers affect the population size of the secondary consumers?
Answers
Answer:
it will cause death of secondary consumer
Explanation:
energy won't be distributed and it will spoil the food chain