The other answer is wrong. It would be pollution. Hope this helps you!
Answer:
low level of calcium would result in fewer signals sent between pre and post synaptic cells.
Explanation:
The calcium has a main role in signal transmission mechanism and here is the mechanism :
1-the impulse reaches the synapse (depolarization which is a voltage change).
2-the voltage gated calcium channels open and let calcium flow into the cell.
3-the calcium causes the synaptic vesicles to rupture and release chemical transmitters which cross the synaptic cleft and finally bind to receptors on the post synaptic cell (transmitting the signal)
so it's obvious that if calcium concentration decreases, the signal transmission also decreases.
Answer: It enables them to cover more of the visible light spectrum and therefore be able to harvest more light energy.
<span>Pigments can be defined as the molecule that
absorb specific wavelength of light or they are substances produced by living
organisms that obtain color from selective color absorption. Thus, the function of pigment in plant is photosynthesis
and they use green pigment chlorophyll with other pigments such as yellow and red
pigment which are being used to captures much light energy as possible.
However, plant gain from having much more than one pigment because it enables
them </span>to cover more of the
visible light spectrum and therefore be able to harvest more light energy.
The answer is D but I know I helped you
Because they are non renewable sources of energy and they took billions of years to form.