NEETBotanySexual Reproduction in Flowering Plants
Select the correct statement for the given figure.
Options
- AThe inner wall of the pollen grain is called the exine.
- BWhen the pollen grain is mature it contains one cell, the vegetative cell.
- CIn over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage. In the remaining species, t
- DThe vegetative cell is smaller, has abundant food reserves and a large irregularly shaped nucleus.
Correct answer
C. In over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage. In the remaining species, t
Step-by-step solution
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin. The cytoplasm of pollen grain is surrounded by a plasma membrane. When the pollen grain is mature it contains two cells, the vegetative cell and generative cell (Figure 1.5b). The vegetative cell is bigger, has abundant food reserve and a large irregularly shaped nucleus. The generative cell is small and floats in the cytoplasm of the vegetative cell. It is spindle shaped with dense cytoplasm