The answer is B (speed up chemical reactions).
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.
True
S phase -
synthesis phase, during this phase , a cell copies it's DNA
Answer:
The well labelled diagram of a fern plant in division Pteridophyta.
