The two types of nuclei in Paramecium are the ........, which controls normal cellular metabolism, and the ................., which is involved in reproduction.

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to the organism Paramecium, which is a single-celled protozoan.

2. **Recognize the Types of Nuclei**: Paramecium possesses two distinct types of nuclei: the macronucleus and the micronucleus.

3. **Function of the Macronucleus**: The macronucleus is the larger of the two nuclei and is responsible for controlling normal cellular metabolism. It manages the everyday functions and activities necessary for the survival of the organism.

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