Which of the following is false?

Options

A. Fertilization is external (in water) in frog
B. In frog, development involves larval stage called tadpole
C. Tadpole undergo metamorphosis to form the adult
D. Development in frog is direct

Answer

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

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The statement claims that fertilization in frogs is external and occurs in water.
- **True or False?** This statement is true. Frogs are amphibians, and they typically reproduce by laying eggs in water, where external fertilization occurs.

2. **Analyze the Second Statement:**
- The statement mentions that the development of frogs involves a larval stage called tadpole.
- **True or False?** This statement is also true. Frogs undergo a larval stage known as the tadpole, which is aquatic and resembles a fish.

3. **Analyze the Third Statement:**
- The statement states that tadpoles undergo metamorphosis to form adults.
- **True or False?** This is true as well. Tadpoles undergo metamorphosis, during which they transform into adult frogs, losing their tails and developing limbs.

4. **Analyze the Fourth Statement:**
- The statement claims that development in frogs is direct.
- **True or False?** This statement is false. Frogs exhibit indirect development, as they go through a larval stage (tadpole) before becoming adults. Direct development would mean that the young resemble the adults and do not go through a larval stage.

### Conclusion:
The false statement is the fourth one, which claims that development in frogs is direct.

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