NTA Abhyas NEET2020BotanyAnatomy of Flowering PlantsPractice
The living component of phloem tissue is
Options
- ASieve tube
- BCompanion cells
- CBast parenchyma
- DAll of these
Correct answer
D. All of these
Step-by-step solution
Phloem is the complex tissue used in the transport of organic food materials from leaves to stem and roots in a downward direction. It consists of the following elements: Sieve element (long tube-like cells placed end to end, forming a continuous channel with perforations and hence called sieve tubes), companion cells (thin-walled, more or less elongated cells and which are associated with sieve tubes with a prominent nucleus and are, therefore, living in nature), phloem parenchyma (elongated with rounded ends and