Which of the following statement is incorrect ?

Options

A. Fertilization occurs in fallopian tube
B. Fertilization is a physio- chemical process / event
C. Cleavage produces morula
D. Cleavage leads to increased mass of protoplasm

Answer

To determine which statement is incorrect, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option A: Fertilization occurs in the fallopian tube.**
- Fertilization is indeed the fusion of male and female gametes, and in humans, this process occurs internally within the female reproductive system, specifically in the fallopian tube.
- **Conclusion:** This statement is correct.

2. **Option B: Fertilization is a physiochemical process.**
- Fertilization involves both physical and chemical processes. The physical aspect includes the movement of sperm to the egg, while the chemical aspect involves reactions such as the acrosomal reaction that facilitates the fusion of the sperm and egg.
- **Conclusion:** This statement is also correct.

3. **Option C: Cleavage produces morula.**
- After fertilization, the zygote undergoes cleavage, which is a series of rapid cell divisions. This process leads to the formation of a morula, which is a solid ball of cells.
- **Conclusion:** This statement is correct.

4. **Option D: Cleavage leads to increased mass of protoplasm.**
- Cleavage is characterized by the division of the zygote into smaller cells (blastomeres) without an increase in the overall mass of protoplasm. The total amount of cytoplasm remains the same, as it is merely divided among the new cells.
- **Conclusion:** This statement is incorrect.

### Final Answer:
The incorrect statement is **Option D: Cleavage leads to increased mass of protoplasm.**

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