3 hope this helps!!!!!!!!!!!!!!!
Option B, "They need more oxygen to function, so gas exchange needs to increase. "
Answer:
Originally, the distinction was based on morphological differences. However, it soon became that some types of organisms had different forms at various stages in their lives, here is why
Explanation:
changed genes is passed on to the next generation. Most mutations are bad, but some of them make the organism more successful in its life. Organisms that inherit that favorable new gene are likely to become more abundant than others of the species. (geologic times)
The answer is b) bent angle
I think the answer to this is abyssal plane
