I Believe the answer to your question is True.<span />
Alleles are the individual genes that give rise to certain characteristics in an organism.
When an allele is "fixed" to a population, this means that the characteristic will be constant & most likely will not change until the environment changes as well.
Like with arctic hare, the alleles that influence the color of their coats (white in the winter & brown in the spring/summer) will stay because any fur pattern other than the aforementioned characteristics with result in becoming someone else's food with the lack of camouflage.
Hope that helps!
The cells that produce pepsin, an enzyme that breaks down proteins during the digestive process is Chief cells. Pepsin is the main digestive enzyme in the stomach that breaks down proteins. Pepsin is produced by the chief cells in the inactive form pepsinogen, which is then converted to pepsin by the hydrochloric acid from the parietal cells.
Smooth ER versus Rough ER
Answer:
through excess us of corbon(ii)oxide emitting product such as charcoal that cause global warming hence depletion of oxygen in air
