Answer:
Explanation:
A -nitrogen bases
B- sugar phosphate backbone
C. esophagus. it does not secrete any enzymes. its just do peristalsis. which is a rhythmic contractions and relaxations of muscles to push food along the gut
Answer: 2. A change in physical behavior for the purpose of survival.
Awnser is b cause i look good
The answer is counter shading.
Countershading is used by the predatory fishes. It is a form of camouflage in which the animal's pigmentation is darker on the upper side and lighter on the lower side of the body. It made the predators detection from the prey but counterbalancing the effects of self-shadowing.
