The right option is B. Receptors
<span>Receptors are organs or cells that receive information
about some changes in the environment. Receptors respond to the stimulus such as
heat, light or environmental stimuli by transmitting or opposing the stimuli.
This way homeostasis is maintained. From the question given above, the skin and
brain acts as receptors in maintaining homeostasis.</span>
Arising of a new species is not a rare thing. Organisms are always in a competition to survive long. Speciation, as what they call it, is happening from time to time because organisms evolve in order to adapt to the environment where they are in. However, this process is a slow one thus it is almost impossible to see a new species arising.
Cholinergic fibers always release AcetylCholine (ACh).
Adrenergic fibers always release NorEpinephrine (NE).
If the acidity of the solution increased 100 times the amount that it was. Then the solution of what a pH level of 1 or a very low number. Because the even though the solution is a base it still has a level of acidity.
♥ It would be very hard considering <span>with no light there's no reaction.
♥ That means the plant wouldn't intake any CO2.</span>