19
Product of photosynthesis is transported from the leaves to various parts of the plants and stored in some cell before being utilised. What are the cells/tissues that store them?
Explanation
The food gets stored in specialised parenchymatous cells present either in roots and stems or in their modifications in the form of a polysaccharide called starch.
20
Protoxylem is the first formed xylem. If the protoxylem lies next to phloem what kind of arrangement of xylem would you call it?
Explanation
It protoxylem lies next to phloem the condition of the xylem arrangement is called as exarch. It is found roots.
21
What is the function of phloem parenchyma?
Explanation
The main function of phloem parenchyma is to store food and other substances like resins, latex and mucilage. They also help in transport of food.
22
What is present on the surface of the leaves which helps the plant prevent loss of water but is absent in roots?
Explanation
Cuticle It is a waxy coating covering the entire plant body surface. It is absent in roots, it prevents the loss of water through the surface of the plant body.
23
What is the epidermal cell modification in plants which prevents water loss?
Explanation
Bulliform cells check the water loss. Bulliform or motor cells are modified epidermal cells present in monocots or grasses. Under stressed conditions, they help in shutting down stomata and thus reduce water loss through transpiration.