Thank you for posting your question here. Below are the choices that can be found elsewhere:
a. a new mutation allowed moths to survive
<span>b. the light moths had an advantage </span>
<span>c. the phenotype frequency changed </span>
<span>d. moths learned to adapt to their environment
</span>
The answer is C
The ileocecal valve prevent the back flow of materials from the large intestine to the ileum of the small intestine.
Red blood cells are able to maintain homeostasis because they are bathed in blood, which is isotonic <span>to the fluid in the cells themselves.
</span>A solution is said to be isotonic when its effective osmole<span> concentration is the same as that of another solution.</span>
<span>Nucleic acids as the </span>nitrogen<span> is part of the </span>nitrogen<span> base and the phosphorous is part of the </span>phosphate<span> group.</span>
