Answer:
c
Explanation:
Gas exchange. Gas exchange occurs as a result of respiration, when carbon dioxide is excreted and oxygen taken up, and photosynthesis, when oxygen is excreted and carbon dioxide is taken up. The rate of gas exchange is affected by: the area available for diffusion.
Your answer would be A) 417
Carbon dioxide, water and energy.
Answer:
they open up to get the energy from the sun.
Explanation:
Answer:
im pretty sure its form a hypothesis
