A: Formatin of mature male gametophyte requires one meiotic and one mitotic division in 60% of the anglosperms
R: Pollination occurs in three celled conditon in majority of angiosperms

Options

A. if both assetion A reason are ture and the reason is the correct explanation of the assertion then mark
B. if both assertion & reason are true and the reason is not the correct explanation of the assertin then mark
C. if assertion is true statement but reason is false then mark
D. if both assertion and reason are flase statements then mark

Answer

To solve the assertion and reason question, let's break down the statements step by step.

### Step 1: Analyze the Assertion
The assertion states that "Formation of mature male gametophyte requires one meiotic and one mitotic division in 60% of the angiosperms."

- In angiosperms, the male gametophyte is represented by the pollen grain.
- The formation of the pollen grain involves meiosis, which produces microspores. Each microspore undergoes mitotic division to form the mature male gametophyte.
- In 60% of angiosperms, the pollen grains are shed at the two-celled stage, which consists of a vegetative cell and a generative cell.

**Conclusion for Assertion:** The assertion is **true**.

### Step 2: Analyze the Reason
The reason states that "Pollination occurs in three-celled condition in the majority of angiosperms."

- The three-celled condition refers to the stage where the pollen grain has undergone a second mitotic division, resulting in two sperm cells and one vegetative cell.
- However, it is important to note that the majority of angiosperms (about 60%) shed their pollen grains at the two-celled stage, not the three-celled stage.
- Only about 40% of angiosperms have pollen grains that are shed in the three-celled condition.

**Conclusion for Reason:** The reason is **false**.

### Final Conclusion
Since the assertion is true and the reason is false, the correct answer to the question is that the assertion is true, but the reason is false.