Question

Number of cells in Angiosperm pollen grains at the time of release

• A. 2 cells
• B. 3 cells
• C. 1 cell
• D. 4 cells

Hint:

Most angiosperms release bicellular pollen (vegetative cell + generative cell).

Answer 1

The Correct Option is A

Step 1: Understanding pollen grain development.
In angiosperms, pollen grains are formed after meiosis and subsequent mitotic divisions in the microspore. The structure of pollen at the time of release varies among species.

Step 2: Formation of vegetative and generative cells.
The microspore undergoes mitosis to form two cells: a vegetative cell and a generative cell. This is the typical structure at the time of pollen release in many angiosperms.

Step 3: Mature pollen grain condition.
At the time of release, most angiosperm pollen grains are in a bicellular stage containing two cells, although in some species the generative cell may divide later.

Step 4: Analysis of options.
Option (2), (3), and (4) do not represent the standard condition of angiosperm pollen grains at release. The correct and most common condition is two-celled pollen.

Step 5: Biological significance.
The two-celled stage ensures that the pollen is functionally ready for germination and fertilization after reaching the stigma.

Step 6: Final conclusion.
Thus, the correct answer is 2 cells.