Which feature differentiates a tadpole from an adult frog?

Options

A. Presence of limbs
B. Presence of eyes
C. Presence of gills
D. Presence of skin

Answer

**Step-by-Step Solution:**

1. **Understanding Metamorphosis**: The process by which a tadpole transforms into an adult frog is called metamorphosis. This is a biological process that involves significant physical changes in the animal's appearance and structure.

2. **Life Cycle of a Frog**: The life cycle of a frog begins with eggs laid in water. Once fertilized, these eggs develop into tadpoles.

3. **Characteristics of Tadpoles**: Tadpoles are the larval stage of frogs. They have specific features such as:
- Gills for respiration (since they live in water).
- A tail for swimming.
- No limbs (legs).

4. **Transition to Young Frog**: As tadpoles grow, they undergo changes and develop into young frogs. At this stage, they start to grow limbs, but still have a tail.

5. **Adult Frog**: Eventually, the young frog matures into an adult frog. The adult frog has fully developed limbs and loses its tail. Adult frogs are capable of living both in water and on land.

6. **Key Differentiating Feature**: The primary feature that differentiates a tadpole from an adult frog is the presence of limbs. Tadpoles do not have limbs, while adult frogs do.

**Final Answer**: The presence of limbs differentiates a tadpole from an adult frog.

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