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, we will analyze each option provided in the question systematically.

**Step 1: Analyze Option 1**
- The statement claims that the ovaries in frogs are structurally and functionally connected with the kidneys.
- This statement is **false**. While the ovaries are located near the kidneys, they are part of the reproductive system and do not have a functional connection with the kidneys. The kidneys are primarily involved in filtering waste from the blood.

**Step 2: Analyze Option 2**
- The statement claims that a mature female frog can lay 2,500 to 3,000 unfertilized ova at a time.
- This statement is **true**. It is well-documented that mature female frogs can indeed lay this number of eggs, and they are typically unfertilized at the time of laying.

**Step 3: Analyze Option 3**
- The statement claims that in male frogs, there are 10 to 12 vas deferentia that arise from the testes and enter the kidneys, opening into the vasa deferentia.
- This statement is **true**. Male frogs have multiple vas deferentia that transport sperm from the testes to the cloaca, which is part of the excretory and reproductive systems.

**Step 4: Analyze Option 4**
- The statement claims that the eggs of frogs are mesolecithal and telolecithal.
- This statement is **true**. Frog eggs are classified as mesolecithal (having moderate yolk) and telolecithal (having a yolk that is concentrated at one end).

**Conclusion:**
Based on the analysis, the false statement is from **Option 1**: "The ovaries in frogs are structurally and functionally connected with the kidneys."

---