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The protistans in which cell size decrea...

The protistans in which cell size decreases with each dicreases with each Moulds are

A

Dinoflagellates

B

Diatoms

C

Slime Moulds

D

Radiolarians.

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question:** The question asks about protistans whose cell size decreases with each division. We need to identify which type of protist fits this description from the given options. 2. **Analyzing the Options:** The options provided are: - Dinoflagellate - Diatom - Trimoun - Radiolarian 3. **Identifying Characteristics of Each Option:** - **Dinoflagellates:** These are typically known for their flagella and are not characterized by a decrease in cell size with division. - **Diatoms:** These are unicellular algae with a unique silica cell wall. They reproduce asexually, and with each division, one daughter cell maintains the original size while the other becomes smaller. - **Trimoun:** This option is less commonly known, and its characteristics do not specifically relate to size reduction with division. - **Radiolarians:** These are also protists but are not known for a decrease in size with each division. 4. **Focusing on Diatoms:** Diatoms reproduce asexually by binary fission. In this process: - The original cell divides into two. - One daughter cell retains the original size, while the other is smaller. - This pattern continues, leading to a gradual decrease in the size of one of the daughter cells with each division. 5. **Conclusion:** Based on the analysis, the correct answer is **Diatom**, as they are the protists that exhibit a decrease in cell size with each division. ---
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