NEET BIOLOGY

Detailed explanation-1: -The function of companion cells is to support sieve elements by carrying out cell metabolism and regulation. Companion cells have a dense cytoplasm with abundant organelles, vacuoles, and large nuclei. They load and upload metabolites into the cavity of sieve elements.

Detailed explanation-2: -Companion cells are found along with sieve tube elements in the phloem. The main function of companion cells is to maintain pressure gradient in the sieve tube elements.

Detailed explanation-3: -The main functions of sieve tube members include maintaining cells and transporting necessary molecules with the help of companion cells. The sieve tube members are living cells (which do not contain a nucleus) that are responsible for transporting carbohydrates throughout the plant.

Detailed explanation-4: -Sieve tubes are a component of the phloem in plants. They function as the vessle that transports organic food and other material across the plant.

Detailed explanation-5: -Both albuminous cells and companion cells function to load and unload sugars into the cavity of the sieve cells or sieve tube members. Sieve cells (and associated albuminous cells) are the ancestral sugar-conducting cells and are found in all nonflowering vascular plants.