Question

Draw the diagram of a mature pollen grain released at the two-celled stage and label four parts in it.

Hint:

In oogenesis, meiosis is incomplete until fertilization. This ensures that the female gamete (ovum) is haploid, ready to merge with the male gamete during fertilization. In pollination, the main aim is to transfer pollen efficiently between flowers to ensure genetic diversity.

Answer 1

Diagram of a mature pollen grain at the two-celled stage:
The mature pollen grain consists of two cells:
- Generative cell: It divides to form two sperm cells during fertilization.
- Vegetative cell: It is larger and controls the growth of the pollen tube. $$\text{Diagram of pollen grain with 4 labeled parts:}$$ \[ \begin{array}{c|c} \text{Generative Cell} & \text{Vegetative Cell}
\hline \text{Pollen Tube} & \text{Nucleus}
\end{array} \]