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A fern differs from a moss in having : ...

A fern differs from a moss in having :
(a) ciliated antherozoids
(b) an independent sporophyte
(c) a dependent gametophyte
(d) heteromorphic alternation of generations

A

ciliated antherozoids

B

an independent sporophyte

C

a dependent gametophyte

D

heteromorphic alternation of generations

Text Solution

AI Generated Solution

The correct Answer is:
To determine how a fern differs from a moss, we need to analyze the options provided in the question: 1. **Understanding the Organisms**: - Ferns belong to the group called pteridophytes. - Mosses belong to the group called bryophytes. 2. **Examining the Options**: - **(a) Ciliated antherozoids**: Both ferns and mosses have flagellated sperm (antherozoids), but the presence of ciliated antherozoids is not a distinguishing feature between the two. - **(b) An independent sporophyte**: Ferns have a dominant sporophyte generation that is independent and photosynthetic. In contrast, mosses have a dependent sporophyte that is attached to and relies on the gametophyte for nutrition. - **(c) A dependent gametophyte**: In mosses, the gametophyte is the dominant stage, while in ferns, the gametophyte is independent but smaller and less significant than the sporophyte. - **(d) Heteromorphic alternation of generations**: Both ferns and mosses exhibit alternation of generations, but ferns have a more complex life cycle with distinct differences in the morphology of the sporophyte and gametophyte. 3. **Conclusion**: - The most significant difference between ferns and mosses is that ferns have an **independent sporophyte** (option B), while mosses have a dependent sporophyte. Thus, the correct answer is **(b) an independent sporophyte**.
To determine how a fern differs from a moss, we need to analyze the options provided in the question: 1. **Understanding the Organisms**: - Ferns belong to the group called pteridophytes. - Mosses belong to the group called bryophytes. 2. **Examining the Options**: - **(a) Ciliated antherozoids**: Both ferns and mosses have flagellated sperm (antherozoids), but the presence of ciliated antherozoids is not a distinguishing feature between the two. ...
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