The statement that best describes the difference between a gene and an allele is that a section of DNA that usually contains the code for a specific protein that determines a specific trait is a gene, while an allele is a section of a gene. The correct option among all the options that are given in the question is the last option or option "D".
Answer:
A thick, dense fur, keeps the fox warm during winter, by preventing excessive loss of temperature and body heat when it is cold.
Answer:
Populations will decline.
Explanation:
Since individuals will be less likely to successfully reproduce, and because they will not be able to breed with other birds on the breeding grounds.
Hopefully this helps :)
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.