AP BIOLOGY

Detailed explanation-1: -The only answer that is not an adaptation of a root hair cell is (B). The adaptation that root hair cells do not have is that they contain many chloroplasts that photosynthesize and provide glucose for the root.

Detailed explanation-2: -Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption. They also contain lots of mitochondria, which release energy from glucose during respiration in order to provide the energy needed for active transport.

Detailed explanation-3: -These cells are located underground. This means that they do not contain chloroplasts (there is no light for photosynthesis).

Detailed explanation-4: -Explanation for correct option: The function of root hairs is to collect water and mineral nutrients present in the soil and take this solution up through the roots to the rest of the plant. As root hair cells are absent in root cap water absorption does not take place.

Detailed explanation-5: -Plants are able to absorb water and mineral ions from the soil through the process of osmosis. Just behind the growing tips of roots are thousands of tiny root hairs. These tiny root hairs increase the surface area of the root epidermis and are the main area of osmosis.