the number of appendages present in most vertebrates is

Options

A. one pair
B. two pairs
C. three pairs
D. four pairs

Answer

To solve the question regarding the number of appendages present in most vertebrates, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Appendages**:
- Appendages in vertebrates typically refer to limbs, which include arms and legs.

2. **Identify the Classification of Vertebrates**:
- Most vertebrates are classified as tetrapods, which means "four feet" in Greek.

3. **Determine the Number of Limbs in Tetrapods**:
- Tetrapods generally have four limbs. This can be categorized into two pairs: one pair of forelimbs (arms) and one pair of hindlimbs (legs).

4. **Examples of Vertebrates**:
- For instance, in humans, there is one pair of arms (forelimbs) and one pair of legs (hindlimbs), totaling four limbs.
- Similarly, in cows, there are two forelimbs and two hindlimbs, which also totals four limbs.

5. **Conclusion on the Number of Appendages**:
- Since most vertebrates are tetrapods, they have two pairs of appendages, which equals four appendages in total.

6. **Select the Correct Option**:
- Among the given options (one pair, two pairs, three pairs, four pairs), the correct answer is **two pairs**.

### Final Answer:
The number of appendages present in most vertebrates is **two pairs**.

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