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Paramecium contains...

Paramecium contains

A

Two micronuclei only

B

two macronuclei only

C

One macro-and one, two or more micronuclei

D

One micro-and one,two or more macronuclei

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "Paramecium contains," we need to analyze the structure of Paramecium and the types of nuclei it possesses. ### Step-by-Step Solution: 1. **Understanding Paramecium**: Paramecium is a unicellular organism classified under the kingdom Protista. It is commonly found in freshwater environments. 2. **Types of Nuclei in Paramecium**: Paramecium contains two types of nuclei: - **Macronucleus**: This is typically one in number, has a kidney shape, and is packed with chromatin and genetic material. It is also referred to as the vegetative nucleus. - **Micronucleus**: This can vary in number; Paramecium can have one, two, or three micronuclei. The micronucleus does not have a nucleolus and is referred to as the generative nucleus. 3. **Evaluating the Options**: - **Option 1**: 2 micronuclei only - Incorrect, as Paramecium has at least one macronucleus. - **Option 2**: 2 macronuclei only - Incorrect, as Paramecium has only one macronucleus. - **Option 3**: 1 macronucleus and 1, 2, or 3 micronuclei - Correct, as this accurately describes the nuclear composition of Paramecium. - **Option 4**: 1 micronucleus and 1, 2, or 3 macronuclei - Incorrect, as there is only one macronucleus. 4. **Conclusion**: Based on the analysis, the correct answer is **Option 3**: Paramecium contains 1 macronucleus and 1, 2, or 3 micronuclei.
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Assertion : Paramecium takes food by exocytosis. Reason : In paramecium, ejection of undigested material occurs through endocytosis.