Which of the following statements is false ?

Options

A. The ovaries in frog are structurally and functionally connected with kidneys
B. A mature female frog can lay 2500 to 3000, unfertillised ova a time
C. In male frog there are 10-12 vasa efferentia arise from testes and enter kidneys on their side and open into Bidder's canal
D. The eggs of frog are mesolecithal and telolecithal

Answer

To determine which statement is false regarding frogs, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Analyze the first statement:**
- **Statement:** The ovaries in frogs are structurally and functionally connected with kidneys.
- **Analysis:** This statement is false. The ovaries are located near the kidneys but are not structurally or functionally connected to them. They have separate functions in the reproductive system.
- **Conclusion:** This statement is false.

2. **Analyze the second statement:**
- **Statement:** A mature female frog can lay 2500-3000 unfertilized ova at a time.
- **Analysis:** This statement is true. Mature female frogs can lay a larger number of eggs, often up to 4000 or more, but the statement itself is not false as it falls within a reasonable range.
- **Conclusion:** This statement is true.

3. **Analyze the third statement:**
- **Statement:** In male frogs, there are 10-12 vas deferens that differentiate from testes and enter kidneys on their side and open into the cloaca.
- **Analysis:** This statement is true. Male frogs have 10-12 vas deferens that transport sperm from the testes to the kidneys and then to the cloaca.
- **Conclusion:** This statement is true.

4. **Analyze the fourth statement:**
- **Statement:** The eggs of frogs are mesolecithal and telolecithal.
- **Analysis:** This statement is true. Frog eggs are classified as mesolecithal due to a moderate amount of yolk, which is concentrated in the lower part of the egg.
- **Conclusion:** This statement is true.

### Final Conclusion:
The false statement among the options is that the ovaries in frogs are structurally and functionally connected with kidneys.

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