Frog's heart<span> has one ventricle, while humans have 2, hence deoxygenated blood from body mixes with the oxygenated blood coming from lungs.
Source: S</span><span>ocratic</span>
The correct answers on Plato are
excretory system
circulatory system
Answer:
B. Theory
Explanation:
A theory can be changed as new information is discovered.
A. The hemisphere of the Earth is tilted more toward the Sun.