Answer:
they developed some structures or parts to survive
the terrestrial environment
<span>The process of creating egg cells.</span>
I believe the climate, and what hemisphere (north or south) that ecosystem is in.<span />
Ans: Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
