Read the given statements and choose the correct statements among the following.
I. Apogamy is the process which involves fusion of gametes.,br>II. Fusion of two dissimilar gametes is called anisogamy.
III. Fusion of large motile gametes and small non-motile gamete is oogamy.
IV. Fusion of morphologically similar gametes is called isogamy.

Options

A. I and II
B. II and IV
C. III and IV
D. I and IV

Answer

To solve the question, we need to analyze each statement regarding the processes of gamete fusion in reproduction and determine which ones are correct.

### Step-by-Step Solution:

1. **Statement I: Apogamy is the process which involves fusion of gametes.**
- **Analysis:** This statement is incorrect. Apogamy refers to the development of a sporophyte from a gametophyte without the fusion of gametes. The correct term for the fusion of gametes is syngamy.
- **Conclusion:** **Incorrect**

2. **Statement II: Fusion of two dissimilar gametes is called anisogamy.**
- **Analysis:** This statement is correct. Anisogamy refers to the fusion of two gametes that are different in size or form, such as a large non-motile egg and a small motile sperm.
- **Conclusion:** **Correct**

3. **Statement III: Fusion of large motile gametes and small non-motile gamete is oogamy.**
- **Analysis:** This statement is incorrect. Oogamy is characterized by the fusion of a large non-motile gamete (the egg) and a small motile gamete (the sperm). The statement incorrectly describes the characteristics of the gametes.
- **Conclusion:** **Incorrect**

4. **Statement IV: Fusion of morphologically similar gametes is called isogamy.**
- **Analysis:** This statement is correct. Isogamy refers to the fusion of gametes that are similar in size and shape, which means they are morphologically identical.
- **Conclusion:** **Correct**

### Final Conclusion:
The correct statements are **II and IV**. Therefore, the answer is that the correct option is **B** (which includes statements II and IV).