Answer:
Shape of Red Blood Cells Erythrocytes are biconcave discs with very shallow centers. This shape optimizes the ratio of surface area to volume, facilitating gas exchange. It also enables them to fold up as they move through narrow blood vessels.
Photosynthesis reverses the biochemical pathways of respiration.
Answer:C. It carries cold water from the equator to the poles.
D. It wears away rock and soil.
E. It reflects sunlight that hits the oceans.
(hope this helps)
Nutrition, respiration ,growth excretion, homestais, reproduction, movement, and sensitivity
