First answer is , as the work of ventricle is to push blood to he whole body , so it has to be strong or it can not pump blood to head to the toe !
as in frog (an amphibian ) it has only three chambers as two artia and one ventricle, so the oxygenated blood from left artia and deoxygenated blood from right , combines and thus partial oxygenated blood is circulated !
Answer: 2,000 miles.
Explanation:
The Aleutian Trench, which has formed along the convergent boundary and has been produced by the subduction of the oceanic plate, extends for 2,000 miles.
They were completely heterophic in nature because it allowed them to absorb different material from the environment as an energy source
The answer is C hope this helps!