AP BIOLOGY

Detailed explanation-1: -But, roots play a critical role in the life of a plant. They anchor the plant to support the shoots above. They absorb water and mineral nutrients and conduct them upwards. They store carbohydrates and other nutrients that are a source of energy for biennials and perennials as they awaken and grow in spring.

Detailed explanation-2: -These plants have a single root that extends downward at the time of germination from the embryonic region known as the radicle and becomes the taproot. From this single taproot grows the plant’s secondary roots, which extend out in many directions searching for water and nutrients.

Detailed explanation-3: -The correct option is A True. Transpiration: It is a biological process of water loss in the form of water vapor from the stomatal openings on the aerial parts of the plant. It does not occur at night because the stomata remain closed during the night.

Detailed explanation-4: -Xylem transports water, minerals, and nutrients from the soil to all the plant parts. There are two types of “transport” tissues in plants-xylem and phloem. Water and solutes are transported by the xylem from the roots to the leaves, and food is transported from the leaves to the rest of the plant by the phloem.