Answer:
A
Explanation:
Reptiles arose about 310–320 million years ago during the Carboniferous period.
Gametophytes are photosynthetic & have root-like rhizoids.
Answer: Negative feedback serves to reduce an excessive response and to keep a variable within the normal range. Negative feedback loops control body temperature and the blood glucose level.
Answer:
The correct answer is A.) Forms the plant cell wall.