Question

In the given diagram name the part P, Q, R, S, and T

• A. P - germ pore, Q - generative cell, R - intine, S - exine, T - vegetative cell
• B. P - germ pore, Q - generative cell, R - exine, S - intine, T - vegetative cell
• C. P - intine, Q - exine, R - germ pore, S - generative cell, T - vegetative cell
• D. P - exine, Q - intine, R - vegetative cell, S - germ pore, T - generative cell.

Answer 1

The correct option is D P - exine, Q - intine, R - vegetative cell, S - germ pore, T - generative cell.

The above image represents a pollen grain. Each pollen grain is surrounded by a tough protective wall called an exine(P). This is a tough covering that allows the pollen grain to survive harsh conditions for long periods of time. The intine (Q) is another thin protective coating. The mature pollen grain has 2 cells - vegetative cell and the generative cell. The vegetative cell is bigger, abundant food reserve and large nucleus. the generative cell is small, spindle-shaped with dense cytoplasm and a nucleus. The germ pore in the pollen grain, a thin-walled area through which the germ tube or pollen tube emerges on germination.

P - Exine
Q - Intine
R - Vegetative cell
S - Germ pore
T - Generative cell