Which of the following statement is false?

Options

A. The ovaries in frog are structurally and functionally connected with kidneys
B. A mature female from an lay 2500 to 3000, unfertilised ova at 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

Explanation

To determine which statement is false regarding the reproductive and excretory systems in frogs, we can analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement**:
- The statement claims that "the ovaries in frogs are structurally and functionally connected with kidneys."
- **Understanding**: Ovaries are the female reproductive organs responsible for gametogenesis (formation of ova). Kidneys are part of the excretory system responsible for filtration and absorption.
- **Conclusion**: While ovaries and kidneys are located near each other (structurally connected), they do not functionally connect. Therefore, this statement is **false**.

2. **Analyze the Second Statement**:
- The statement claims that "a mature female frog can lay 2,500 to 3,000 unfertilized ova at a time."
- **Understanding**: Frogs undergo external fertilization, and it is known that a female frog can indeed lay a large number of eggs in one go.
- **Conclusion**: This statement is **true**.

3. **Analyze the Third Statement**:
- The statement claims that "in male frogs, there are 10 to 12 vas deferentia that arise from the testis and enter kidneys on their side and open into the Bidder's canal."
- **Understanding**: This describes the male reproductive system accurately, where vas deferentia transport sperm from the testes to the Bidder's canal.
- **Conclusion**: This statement is **true**.

4. **Analyze the Fourth Statement**:
- The statement claims that "the eggs of the frog are mesolecithal and telolecithal."
- **Understanding**: Mesolecithal refers to moderate yolk distribution, while telolecithal refers to yolk concentrated at one end. Frogs typically have mesolecithal eggs.
- **Conclusion**: This statement is **true**.

### Final Answer:
The **false statement** is: "the ovaries in frogs are structurally and functionally connected with kidneys."

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