The uterus lining thickens because it provides protection for the baby to survive. When estrogen levels rise, the lining of the uterus thickens in preparation for fertilization.
Answer:
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals. Cellular respiration begins in the cytoplasm of cells.
Explanation:
Cellular respiration. Cellular respiration can occur both aerobically (using oxygen), or anaerobically (without oxygen). During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell.
CHEMICAL energy that cells use to produce atp
