The part of the cortex that initiates our voluntary movements is called the primary motor cortex.
The primary motor cortex is a region of the cerebral cortex that is responsible for planning, executing, and controlling voluntary movements of the body.
This part of the brain is located in the precentral gyrus of the frontal lobe of the brain.
The primary motor cortex is also known as Brodmann area 4 and it is divided into two parts: the ventral primary motor cortex (also known as the motor strip) and the dorsal primary motor cortex (also known as the supplementary motor area).
The primary motor cortex, also known as the precentral gyrus or area 4, is responsible for planning, executing, and controlling voluntary movements of the body.
This part of the brain is located in the frontal lobe of the brain and plays a crucial role in the initiation and execution of voluntary movements.
The primary motor cortex receives input from various parts of the brain, including the basal ganglia, cerebellum, and somatosensory cortex.
It then sends signals through the corticospinal tract to the spinal cord, which in turn controls the muscles of the body.
The primary motor cortex is divided into two parts: the ventral primary motor cortex (also known as the motor strip) and the dorsal primary motor cortex (also known as the supplementary motor area).
The ventral primary motor cortex is responsible for controlling the movements of the limbs, while the dorsal primary motor cortex is responsible for controlling the movements of the trunk and the head.
The supplementary motor area is involved in the planning and execution of complex movements, such as those involved in speech and language production.
The primary motor cortex is an essential part of the brain that plays a crucial role in the initiation and execution of voluntary movements.
Damage to this area of the brain can result in motor deficits such as paralysis, weakness, or tremors.
Researchers are continually studying the primary motor cortex to better understand its functions and to develop treatments for motor deficits and other neurological disorders that affect movement.
In conclusion, the primary motor cortex is responsible for initiating voluntary movements in the body.
It is located in the frontal lobe of the brain and is divided into two parts, the ventral primary motor cortex, and the dorsal primary motor cortex.
The primary motor cortex receives input from various parts of the brain and sends signals through the corticospinal tract to the spinal cord, which controls the muscles of the body.
This area of the brain is essential for normal movement, and damage to this area can result in motor deficits.
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Animal waste decay by the action of bacteria which create _____________and __________ products rich in nitrogen, and useful for plants to use again.
Answer:
Ammonia and nitrate
Explanation:
choose one plant or animal and what are the 3 adaptions this organisms has
A gardener plants a row of yellow flowers in her front yard. The next year, she notices that some of the new generation of flowers are yellow, while others are red. Which of the following best explains how this is possible?
A. The red flower allele must be recessive, because it hid behind the yellow allele.
B. The red flower color probably resulted from a mistake in the plant’s DNA.
C. The red flower color probably resulted when the yellow plant mixed its DNA with another species.
D. The red flower allele must be dominant, because it masked the yellow allele.
Answer:
a
Explanation:
what is the frequency of a favored allele at mutation-selection balance when the mutation rate (u) is 0.05 and the selection coefficient (s) is 0.10? please give your answer to two decimal places.
Mutation-selection balance is a state that is reached when the rate of mutation of a gene equals the rate at which the gene is eliminated by selection. This state is characterized by a balance between the forces of genetic drift, selection, and mutation.
At this state, the frequency of the favored allele is determined by the mutation rate and the selection coefficient.The frequency of the favored allele at mutation-selection balance when the mutation rate (u) is 0.05 and the selection coefficient (s) is 0.10 can be calculated using the following formula:
f = sqrt(u/s)
where f is the frequency of the favored allele, u is the mutation rate, and s is the selection coefficient.
Substituting the given values:
f = sqrt(0.05/0.10) = 0.71
Therefore, the frequency of the favored allele at mutation-selection balance is 0.71.
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Pick 5 important key features of the cell membrane and write about each and why they are
important.
A cell membrane, also known as a plasma membrane, is a thin, semipermeable barrier that surrounds the cytoplasm of a cell and separates the cell from its environment.
What do you mean by cytoplasm?
Cytoplasm is the fluid-like substance found in the interior of a cell, excluding the nucleus. It is composed primarily of water and contains a variety of organic and inorganic molecules, ions, and organelles. It functions as the cell’s metabolic center and plays important roles in many cell processes, such as energy production, protein synthesis, and cell division.
Five important key features of the cell membrane:
1. Phospholipid Bilayer: The phospholipid bilayer is important for regulating the flow of substances both into and out of the cell, allowing the cell to acquire the nutrients it needs and expel waste.
2. Glycoproteins: They are important for cell-to-cell communication, as they bind to specific receptors on other cells to facilitate communication between the cells. They also act as recognition sites for hormones and other molecules that enter the cell.
3. Cholesterol: Cholesterol is a fatty molecule that helps stabilize the cell membrane and prevents it from becoming too rigid or too fluid. It also helps regulate the movement of substances across the cell membrane.
4. Integral Proteins: They are important for transporting molecules across the membrane, as well as for recognizing and interacting with other molecules.
5. Peripheral Proteins: They play an important role in cell signaling and regulation, as they can interact with other proteins or molecules on the cytoplasmic side of the cell membrane. They are also important for anchoring the membrane to the cytoskeleton.
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What is hyphae?? like definition make it simple in your own words!!
1. The process by which one type of bacteria is
changed into another type is called
a. transcription.
b. transformation.
c. duplication
d. replication.
Answer:
d
Explanation:
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PLEASE HELP ASAP OR AT LEAST NOT AFTER FRIDAY 11:59 PM
Answer:YES.
Explanation:BECAUSE.
How might rock layers be disturbed? *view answer choices”
Answer:
b
Explanation:
geologist
Answer:
when rocks titled or folded
define a base. a) accepts h ions b) an electron pair donor c) produces h ions in aqueous solution d) an electron pair receiver e) produces oh- ions in aqueous solution
A base is defined as:
c) produces H+ ions in an aqueous solution
In chemistry, a base is a substance that, when dissolved in water, releases hydroxide ions (OH-) or accepts protons (H+). Bases are often characterized by their ability to neutralize acids by combining with hydrogen ions.
When a base is dissolved in water, it dissociates and releases hydroxide ions (OH-), which can then react with hydrogen ions (H+) from an acid to form water (H2O). This process is known as neutralization.
Alternatively, bases can also accept protons (H+) from acids, acting as proton acceptors. This can occur in non-aqueous solvents or in reactions involving molecules other than water.
It is important to note that not all bases produce hydroxide ions. Some bases, such as ammonia (NH3), do not produce hydroxide ions directly but still exhibit basic properties by accepting protons.
In summary, a base is a substance that produces hydroxide ions (OH-) or accepts protons (H+) in aqueous solution, allowing it to neutralize acids and exhibit basic properties.
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Select the correct answer
Answer:
A.
Explanation:
Choice A states, "Human liver cells make proteins that promote homeostasis, and neurons do not." This statement supports that complex, multicellular organisms are composed of specialized cell types with different functions. First, humans are multicellular organisms. Next, Choice A points out the difference between liver and neuron cell function (liver cells can promote homeostasis while neurons do not), which means that the cells that compose a human are specialized with different functions.
In the Fruit Fly Drosophila melanogaster, wings (A) are dominant over a lack of wings (a) and red eyes (E) are dominant over sepia (brownish) eyes (e). A wingless fly that is heterozygous for eye color is crossed with a fly that is heterozygous for both eye color and presence of wings. What are the genotype and phenotypic ratios for this cross? What fraction of the offspring from this cross will be wingless and have sepia eyes? What fraction will have the genotype AaEe?
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Consider the function that computes the concentration of a drug in the blood (in units per liter of blood) hours after swallowing the pill. Compute the rate at which the concentration is changing 6 hours after the pill has been swallowed. Give a numerical answer as your response (no labels). If necessary, round accurate to two decimal places.
The rate at which the concentration of the drug in the blood is changing 6 hours after swallowing the pill is approximately -0.16 units per liter of blood per hour.
To compute the rate at which the concentration is changing 6 hours after swallowing the pill, we need to find the derivative of the concentration function, d(t), with respect to time (t).
Using the quotient rule, the derivative of d(t) with respect to t is:
d'(t) = \([(5t^2 + 125)(350) - (350t)(10t)] / (5t^2 + 125)^2\)
Now, we can substitute t = 6 into the derivative expression to find the rate of change at 6 hours:
d'(6) = \([(5(6)^2 + 125)(350) - (350(6))(10(6))] / (5(6)^2 + 125)^2\)
Evaluating the expression, we find:
d'(6) ≈ -0.16
The resulting value is approximately -0.16 units per liter of blood per hour.
The negative sign indicates that the concentration of the drug is decreasing over time. This implies the drug metabolism or elimination from the body, leading to a decline in its concentration in the blood. The magnitude of the rate (-0.16) signifies the speed or intensity of the concentration change, indicating a relatively moderate decrease in the drug's concentration 6 hours after ingestion.
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Remember that a theory does not become a law because, by definition, a theory can always be altered whereas a law is fact and does not change.
Give an example of a theory in science:
Give an example of a scientific law:
macdonald only has five cows and one bull. he wants to be sure that his bull continues to mate with an individual cow long enough to induce pregnancy. what should he do to prolong the mating episode?
To prolong the mating episode between the bull and an individual cow to increase the chances of inducing pregnancy, MacDonald can consider implementing the following strategies:
Separate the bull and cow from other cows: By isolating the bull and the specific cow from the rest of the herd, MacDonald can eliminate distractions and potential competition from other cows. This can help create a more focused environment for mating.
Control the timing of mating: Observing the cow's estrus cycle and determining the optimal timing for mating can be crucial. MacDonald should be aware of the cow's heat signs, such as mounting behavior, increased vocalization, and clear mucus discharge, indicating the cow is in heat. By accurately identifying the cow's heat period, he can time the mating to increase the likelihood of successful insemination.
Provide a suitable breeding area: Creating a comfortable and controlled environment for mating can contribute to prolonging the mating episode. MacDonald can designate a specific area where the bull and cow can mate without interference or disturbances from other animals or external factors.
Observe and intervene if necessary: MacDonald should closely monitor the mating process to ensure that mating is successful and to intervene if any complications arise. If the mating episode appears to be short or incomplete, he can facilitate and encourage a longer mating period by allowing them to continue mating or by gently guiding the bull and cow back into position if necessary.
By implementing these strategies, MacDonald can maximize the chances of a successful mating and increase the likelihood of inducing pregnancy in the individual cow with the bull.
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According to natural selection, which of the following correctly describes an individual with higher fitness?
an individual who is more likely to survive than others
an individual who has higher reproductive success than others
an individual who is stronger and healthier than less fit individuals
an individual who is better adapted to his/her environment than others
Answer: best adapted to the environment
Explanation: fitness can be thought of as fit for purpose. The most fit for purpose organism is the one best adapted to its environment.
Nevertheless, all the options are characteristic of adaptation
It is not particularly useful to discuss natural selection in terms of individuals and not populations. An advantageous mutation in one individual is the theoretical starting point for a better adapted population, but adaptation happens in a population very slowly if at all if it depends on a single individual. The smaller the population, the higher the probability that the adaptation will be eliminated by chance.
The statement which correctly describes an individual with higher fitness is,
An individual who is more likely to survive than others.So, option A is correct one.
What is Natural selection?The process by which an organism adapt itself better than other and live and reproduce more offspring.It is a way of evolutionThe organism that adapt itself to various environment are more likely to survive and reproduce.According to natural selection, if an individual is with higher fitness then it is more likely to service and reproduce higher than others.There are four condition for natural selection.ReproductionHeredityVariation in the fitness of the organism.Variation in individual characters among members of the population.learn about natural selection
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Pressure _____ with increasing height above the earth.
Decrease
Increase
Answer:
Decreases
Explanation:
There is less air above us as we go up.
For a population to be in Hardy-Weinberg equilibrium, certain conditions must be met. Which of the following best explains a characteristic of the fly populations that meets a condition of Hardy-Weinberg equilibrium?
To determine which characteristic of the fly population meets a condition of Hardy-Weinberg equilibrium.
I would need the specific options provided. Please provide me with the available options, and I'll be able to help you identify the characteristic that meets the condition of Hardy-Weinberg equilibrium.No mutation: The allele frequencies in the population remain constant over generations, assuming there are no new mutations introducing new alleles.Random mating: Individuals in the population mate randomly, with no preference for specific genotypes. This means that individuals do not choose mates based on their genotype.No gene flow: There is no migration of individuals into or out of the population, which would introduce new genetic variation.No genetic drift: The population is large enough that random chance events do not significantly impact allele frequencies. This means that genetic drift, which can cause random fluctuations in allele frequencies in small populations, is negligible.
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A characteristic of fly populations that meets a condition of Hardy-Weinberg equilibrium is the absence of natural selection. In this scenario, all genotypes have the same fitness, meaning that there is no advantage or disadvantage to having a particular genotype.
Additionally, there must be no genetic drift, meaning that the population size is large enough that random events do not significantly affect allele frequencies. Mutation rates must also be low, and there can be no migration or gene flow into or out of the population. If these conditions are met, the allele frequencies will remain constant from generation to generation, and the population will be in Hardy-Weinberg equilibrium.
In order for a fly population to be in Hardy-Weinberg equilibrium, several conditions must be met. One crucial characteristic is random mating. This means that individuals within the population must select their mates without any preference for specific genetic traits. Random mating ensures that allele frequencies remain constant across generations, allowing the population to maintain genetic equilibrium. When this condition is met, along with others such as no mutation, large population size, no gene flow, and no natural selection, the fly population can be considered to be in Hardy-Weinberg equilibrium.
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Thermodynamics
Heat is thermal energy which is passed on or transferred from one object to another. You may have experienced the many different ways heat can transfer energy; from the rays of the sun, to flow of a breeze.
100% energy in the form of solar radiation
34% reflected from clouds & dust
02% Photosvnines
Wind 1%
Evaporating Water 23%
42% towards heating surface and atmosphere
It takes eight minutes for electromagnetic waves to transfer energy from the sun to the earth. This particular type of energy transfer is known as solar radiation.
As the radiation strikes the earth, molecules within the crust of earth begin to move. As the molecules in the earth begin to collide, the process of conduction begins. If you have ever visited the beach during the warm summer months, you have probably experienced walking on very hot sand. The hot sand is the result of the sun's rays transferring heat through the collision of molecules which is known as conduction. As the land of the earth becomes heated, the molecules in the air above the land are affected. As an air mass becomes warmer, it also becomes less dense and begins to rise. As the density changes and the air mass begin to flow, the process known as convection has begun.
Answer the following questions
1. A light was left on over night on a desk. What kind of heat was being let off from the bulb?
a. Convection
b. Conduction
c. Radiation
d. Solar
2. During the summer the energy from the sun causes the black top on some roads to get so hot, the tar bubbles on the surface. What kind of energy transfer causes the molecules within the black top to move?
a. Convection
b. Conduction
c. Radiation
d. Potential
3. Within the local weather report, high winds are said to be moving into the area. What type of energy is responsible for the flow of energy which creates wind?
a.
Radiation
b.
Convection
C.
Conduction
d.
Potential
4. Radiation is energy which is transferred through
a. Waves
b. Convection
c. Conduction
d. movement
5. Pam places a test tube containing water over a Bunsen burner and lights it. On another sheet of paper, describe the heating process of the contents of the test tube. Within your answer be sure to:
• Identify each phase of thermodynamics, including; conduction and convection
• Describe the movement of the water molecules
1) The correct answer is c. Radiation. The heat being let off from the bulb is in the form of thermal energy, which is transferred through electromagnetic waves, or radiation.
2) The correct answer is b. Conduction. The energy from the sun is transferred to the black top through radiation, but the heat causes the molecules within the black top to move through conduction, which is the transfer of heat through collisions between molecules.
3) The correct answer is b. Convection. Wind is created by the movement of air masses, which is driven by convection, the transfer of heat through the movement of fluids (in this case, air).
4) The correct answer is a. Waves. Radiation is the transfer of energy through electromagnetic waves, such as visible light, infrared radiation, and ultraviolet radiation.
5) As the Bunsen burner heats the test tube, the water molecules within the test tube begin to move faster and collide with one another, causing the temperature of the water to increase. This is an example of conduction, the transfer of heat through collisions between molecules. As the water near the bottom of the test tube is heated, it becomes less dense and begins to rise, while cooler water from the top of the test tube sinks down to take its place. This is an example of convection, the transfer of heat through the movement of fluids.
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How can a scientist determine if two species are obligate mutualists? The scientist should observe the species in the environment to determine the types of interactions that the two species have. Then, the scientist should transplant each species alone to a new area and simultaneously transplant both species together to see if the single-species transplants die. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then add an invading species to see if it outperforms one of the other species. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then transplant both species to a new location to observe if they do better or worse than the individuals in their old location. The scientist should observe the species in the environment, determine the types of interactions that the two species have, and then remove one of the species to see if the other species does not survive.
Answer:
The scientist should observe the species in the environment to determine the types of interactions that the two species have. Then, the scientist should transplant each species alone to a new area and simultaneously transplant both species together to see if the single-species transplants die
Explanation:
When two species are obligate mutualists, both species benefit one another in such a way that one cannot survive without the other. Hence, in order to find out if two species are indeed obligate mutualists, they should be transplanted together away from other species on one side, and also transplanted individually on another side.
If they are obligate mutualists, the individual transplant would find it difficult to survive and should die in no time while the transplant done together should survive. All other factors being kept constant.
Explain how DNA fragments are separated by gel electrophoresis
Gel electrophoresis is a widely used technique in molecular biology that allows for the separation of DNA fragments based on their size and charge.
The process involves several steps:
Preparation of the gel: A gel matrix, usually made of agarose or polyacrylamide, is prepared and poured into a gel tray. Small wells are created at one end of the gel, which will hold the DNA samples.
Loading the samples: DNA samples, which have been treated with restriction enzymes to generate fragments of different sizes, are loaded into the wells of the gel.
Applying an electric field: The gel tray is immersed in a buffer solution, and an electric field is applied across the gel. One end of the gel serves as the positive electrode (anode), and the other end as the negative electrode (cathode).
Migration of DNA fragments: When the electric field is applied, negatively charged DNA fragments migrate through the gel towards the positive electrode. Smaller fragments move more quickly through the gel matrix, while larger fragments move more slowly.
Visualization of DNA bands: After the electrophoresis is complete, the DNA fragments are visualized using stains or fluorescent dyes. The bands formed on the gel represent the separated DNA fragments, with each band corresponding to a specific size.
By analyzing the position and intensity of the DNA bands, researchers can determine the size of DNA fragments and gain insights into various genetic phenomena, such as gene mapping, DNA sequencing, and genetic variation analysis.
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Why do plant cells need chloroplasts?
Answer:
Chloroplasts are vital organelles in order for plants to survive.
Explanation:
Chloroplasts capture and convert light energy into chemical energy for the plant to consume through the process of photosynthesis.
Identify the articulation site that allows us to rotate our head, e.g. shaking the head "no".
- Axis / C 3 - Occipital bone / axis - Atlas / axis - Occipital bone / atlas
The articulation site that allows us to rotate our head, e.g. shaking the head "no" is option C: Atlas - axis
What is the articulation site?
The pivot joint between the atlas (C1) and the axis (C2) allows for rotational movements of the head, such as shaking the head "no."
Therefore, The atlas is the topmost vertebra in the cervical spine, and the dens (also called the odontoid process) on the axis serves as a pivot point for the atlas to rotate around. This joint is important for allowing us to move our head in different directions.
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Which statement best describes the
theory put forth by Charles Darwin in
"On the Origin of Species"?
A. All living species have existed in their current forms
since the beginning of the Earth.
B. All living species were created by the hand of a divine
being.
C. All living species exist to preserve the Earth's geologic
landscape.
D. All living species, including humans, see the strong
survive through evolution.
The statement that best describes the theory put forth by Charles Darwin in "On the Origin of Species" is All living species, including humans, see the strong survive through evolution.
Option D is correct.
What is evolution?Evolution is described as the change in heritable characteristics of biological populations over successive generations.
Three basic ideas made up Charles Darwin's theory of evolution:
variation among species members occurred randomlya person's traits might be passed on to their offspring; and only those with advantageous traits would survive due to competition for survival.Learn more about evolution at:
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Which feature forms when one plate is forced to bend and dive under the other?
Answer:
What feature forms when one plate is forced to bend and dive under the other? subduction When an ocean plate collides with another ocean plate or with a plate carrying continents one plate will bend and slide under the other.
Answer: The answer is a subduction zone at a convergent plate boundary.
Explanation: Convergent plate boundaries are where two tectonic plates collide. When one plate moves beneath the other plate it is called subduction. Deep trenches and earthquakes are common occurrences at subduction zone locations.
consider the partial sequence of a peptide. i l w a n r m s h v l f a v e a select all amino acid residues likely to be on the solvent‑exposed surface once the peptide folds into its native conformation.
The amino acid residues likely to be on the solvent-exposed surface of a peptide once it folds into its native conformation are: I, L, W, A, and V. These residues are often found on the exterior of folded proteins and have hydrophobic or hydrophilic properties that allow them to interact with the solvent.
Key points:
The solvent-exposed surface of a folded protein is where the amino acids interact with the surrounding water or solvent.Hydrophobic amino acids such as I (Isoleucine), L (Leucine), and W (Tryptophan) are commonly found on the exterior of folded proteins and tend to be on the solvent-exposed surface.Hydrophilic amino acids such as A (Alanine) and V (Valine) also tend to be on the exterior of folded proteins and can be on the solvent-exposed surface.These residues are typically found on the solvent-exposed surface because they have hydrophobic or hydrophilic properties that allow them to interact with the solvent, and they tend to be more stable in the folded state when they are exposed to the solvent.Other factors such as the specific sequence and interactions between amino acids can also influence which residues are found on the solvent-exposed surface.Learn more about amino acids here:
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Answer:HESNR
Explanation:
HESNR is the correct answer because they are polar and hydrophilic
what will happen if there is no gravitational pull in earth
A lack of gravity would eventually take its toll on our very planet, writes Masters. "Earth itself would most likely break apart into chunks and float off into space." ... Without the force of gravity to hold it together, the intense pressures at its core would cause it to burst open in a titanic explosion.
In the absence of gravity, whatever thing we threw would fly away indefinitely.
What is gravity?the force that pulls a body towards the direction of the earth's center or any other mass-containing physical body. In other words, it is a characteristic of things, of matter. All matter is drawn to all other matter, to put it simply. The stronger the attraction between objects, the more matter there is, and the closer together the items are.
It is the gravitational attraction of all the material in the Sun, pulling it firmly together, that enables nuclear fusion to occur and provides us with heat and light. It was initially responsible for the development of the Solar System. Nevertheless, despite its pervasiveness, gravity is one of the Universe's most enigmatic forces. All objects with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground. What you experience as gravity is that curvature.
Hence, We couldn't survive without gravity. It produces the force that keeps the Earth in orbit around the band that keeps us on the surface of the planet.
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Which of the following is NOT a function of receptors?
Answer:
Receptors they receive signal an initiate a response that send a specific signal onward.
Explanation:
Receptors is performed may be affected environmental factors, like light, temperature, pressure, or other receptors.
Receptors can to be change the conformation and posture response to chemical reactions by called signaling.
Most receptors the cellular parts located the part of reporter outside of the cell.
Receptor and often alter the receptor conformation, and are found membrane, and receptor are located only inside the cell.
Receptor cellular control the functions such gene transcription.
Receptor can induce growth, and death, control channels or the regulate cell, and the cell receptors depends on the type of receptors expressed.
Answer: *Olfactory receptor, taste receptor, thermoreceptors are the receptors used for the senses of smell, taste and perceive temperature stimuli. *Photoreceptors are the receptors used to detect light. They are found in rods and cones of the retina in the eye. *Pain receptors sense the pain in parts of the body.Mar 18, 2015
Explanation:
how can we save endangered animals?
Answer:
There are a couple ways to save endangered animals.
Explanation:
First off, spreading awareness and attention about the topic of endangered animals is important so more people can talk about it. Secondly, you can donate to some organizations helping with species endangerment. Also boycotting your favorite clothing brands that may include harming animals can help.