Given below are two statements : One labelled as Assertion A and the other labelled as Reason R: In the light of the above statements, choose the most appropriate answer from options given below:
- Both A and R are correct but R is NOT the correct explanation of A
- A is correct but R is not correct
- A is not correct but R is correct
- Both A and R are correct and R is the correct explanation of A
Answer
(4) Both A and R are correct and R is the correct explanation of A
Solution
In mosses, the predominant stage of the life cycle is the gametophyte, which has two stages.
The first stage is the protonema stage, a creeping, green, branched and frequently filamentous stage, which develops directly from a spore.
The spores are produced by meiosis in the capsule of the sporophyte. Since the protonema arises directly from a spore, it is the first stage of the gametophyte.
Thus both A and R are correct and R explains A.
Answer: (4)