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Fern gametophyte is generally...

Fern gametophyte is generally

A

homothalic

B

heterothalic

C

monoecious

D

both A and B

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "Fern gametophyte is generally," we need to analyze the characteristics of fern gametophytes and the terminology used to describe their reproductive structures. Here’s a step-by-step breakdown of the solution: ### Step 1: Understand the Structure of Fern Gametophytes - Ferns belong to the group of plants known as pteridophytes, which are characterized by having vascular tissues. - The dominant phase in the life cycle of ferns is the sporophyte, which produces spores through meiosis. **Hint:** Recall that the sporophyte is the dominant phase in ferns and produces spores. ### Step 2: Identify the Gametophyte - The spores produced by the sporophyte germinate to form a small, multicellular, free-living structure known as the gametophyte. - In ferns, this gametophyte is specifically called "Prothallus." **Hint:** Remember that the gametophyte of ferns is called Prothallus. ### Step 3: Examine the Reproductive Structures - The fern gametophyte contains both male and female sex organs. The male sex organ is called antheridia, and the female sex organ is called archegonia. - The presence of both male and female reproductive structures in the same gametophyte indicates a specific reproductive strategy. **Hint:** Identify the names of the male and female reproductive organs in ferns. ### Step 4: Determine the Terminology - The terms homothelic and heterothelic refer to the arrangement of reproductive structures: - **Homothelic:** Both male and female reproductive structures are present on the same thallus (the gametophyte). - **Heterothelic:** Male and female reproductive structures are on different thalli. - The term "monocious" refers to an organism that has both male and female reproductive organs in the same individual. **Hint:** Differentiate between homothelic and heterothelic based on the location of reproductive structures. ### Step 5: Conclusion - Since fern gametophytes (Prothallus) have both male and female reproductive structures on the same individual, they are classified as homothelic and monocious. - Therefore, the correct answer to the question "Fern gametophyte is generally" is **both A (homothelic) and B (monocious)**. **Final Answer:** Both A and B (homothelic and monocious).
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