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In isogamous species, the gametes of Chl...

In isogamous species, the gametes of Chlamydomonas undergo temporary clustering before they depart in pairs. The phenomenon is called

A

Gametic differentiation

B

Clumping

C

Homothallism

D

Parthenogenesis.

Text Solution

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The correct Answer is:
To solve the question regarding the phenomenon that occurs in isogamous species, specifically in Chlamydomonas, we will analyze the options provided and determine the correct answer step by step. ### Step-by-Step Solution: 1. **Understanding Isogamy**: - Isogamous species are those in which the gametes (reproductive cells) are of similar size and shape. In Chlamydomonas, both gametes are morphologically identical. 2. **Identifying the Phenomenon**: - The question states that in isogamous species, the gametes undergo temporary clustering before they depart in pairs. This clustering is a key characteristic of their reproductive process. 3. **Evaluating the Options**: - **Option A: Gametic Differentiation**: This refers to the process where gametes become specialized, which does not apply here since we are dealing with isogamous gametes that are similar. - **Option B: Clumping**: This option describes the phenomenon of gametes gathering together before separating in pairs. This matches the description given in the question. - **Option C: Homothalism**: This term refers to the presence of both male and female reproductive structures on the same individual, which is not relevant to the clustering of gametes. - **Option D: Parthenogenesis**: This is a form of asexual reproduction where an egg develops into an organism without fertilization. This does not apply to the scenario described. 4. **Conclusion**: - After evaluating all options, the correct answer is **Option B: Clumping**. This is the term used to describe the temporary clustering of gametes in isogamous species like Chlamydomonas before they pair up for reproduction. ### Final Answer: The phenomenon is called **Clumping**. ---
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