Answer:
light intensity
carbon dioxide concentration
temperature
Answer:
The genes will be Rr or rr.
Explanation:
Becuase the first generation didn't have the trait, which means the second generation's grandparents had the trait. That's why, the second generation female is mixed, which means the male child can be rr or Rr.
Because it was old and irlt would be more stronger?????
Oxygen.
Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
