NEET BIOLOGY

Detailed explanation-1: -The sieve tube is the conducting element of the phloem. It is formed from a vertical series of elongated cells, interconnected by perforations in their walls in areas known as sieve plates.

Detailed explanation-2: -The sieve elements are elongated, narrow cells, which are connected together to form the sieve tube structure of the phloem. The sieve element cells are the most highly specialized cell type found in plants.

Detailed explanation-3: -Sieve cells and sieve tubes are known as sieve elements.

Detailed explanation-4: -Sieve tubes, which are columns of sieve tube cells having perforated sievelike areas in their lateral or end walls, provide the main channels in which food substances travel throughout a vascular plant.

Detailed explanation-5: -Sieve tubes and companion cells are components of xylem tissue.