DENDROLOGY

Detailed explanation-1: -Phloem is a complex tissue which is concerned with the transport of food materials from leaves to other plant parts. Phloem is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. sieve tubes are longitudinally arranged cells. It is seen associated with the companion cells.

Detailed explanation-2: -…angiosperms are sieve tubes and companion cells found in the phloem (see angiosperm: Vascular tissue). In other vascular plants, parenchyma cells function in the same way as companion cells (that is, as the sieve cell’s living protoplasm), but they are not derived from the same mother cell as the sieve…

Detailed explanation-3: -The phloem is a vascular tissue and is involved in food transport throughout the plant. The sieve tube elements and companion cells are interconnected by channel-forming cells.

Detailed explanation-4: -Gymnosperms and lower plants such as Pteridophytes, mosses and ferns lack sieve tubes and companion cells. Therefore, the correct answer is option b-angiosperms.