D. Is the only one with reason.
<em>Answer:</em>
<em>A group of cells working together is defined as a tissue and several tissues working together comprise an organ. ... The heart is used as an example of an organ which is made up from muscle and valve tissue.</em>
<em>Explanation:</em>
<span>Pacinian corpuscles are rapidly adapting mechanoreceptors so they respond only at the onset and offset of the stimulus. The Pacinian corpuscle has a single afferent nerve fiber. Its end is covered by a sensitive receptor membrane whose sodium channels will open when the membrane is deformed in any way. Pressure thus causes sodium to enter the neuron and create a generator potential. If this potential reaches a certain threshold nerve impulses are formed. This impulse is now transferred along the axon with the use of sodium channels and sodium/potassium pumps in the axon membrane. The magnitude of the stimulus is encoded in the frequency of impulses generated in the neuron. So the more massive or rapid the deformation of a single corpuscle, the higher the frequency of nerve impulses generated in its neuron.</span>
This isn't a topic. But a good tip is to choose something you find interest in. This way you can present your project in a good, happy manor and actually enjoy doing the project.
In a DNA molecule, hydrogen bonds form between nitrogenous bases, such that A (adenine) pairs with its complement T (thymine), and G (guanine) pairs with its complement C (cytosine).
In the above Hydrogen bond, A (adenine) pairs with T ( thymine) while G (guanine) pairs with C (cytosine).
<h3>What is DNA molecule?</h3>
DNA molecule is a type of nucleic acid that is found in living cells. DNA is an acronym for deoxyribonucleic acid. The chromosomes is contained within DNA molecule, it carries hereditary information which can be passed from parent to offsprings.
Read more on DNA:
brainly.com/question/16099437
