Answer:
Photosynthesis takes in the carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere. Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy
Homozygous; when two copies of the same alleles are present.
Answer: B, C and, D
It allows nutrients to enter the cell.
It provides a barrier against disease-causing agents.
It enables cells to interact with their environment.