Noncleiodic eggs occur in :

Options

A. Birds
B. Fish
C. Reptiles
D. Platypus.

Answer

**Step-by-Step Solution:**

1. **Understand the Types of Eggs:**
- There are two main types of eggs: celiotic (or calcareous) eggs and non-celiotic eggs.
- Celiotic eggs have a hard calcium carbonate covering, providing protection.
- Non-celiotic eggs do not have a hard covering and are typically found in aquatic environments.

2. **Identify the Characteristics of Non-Celiotic Eggs:**
- Non-celiotic eggs are soft and lack a hard shell.
- These eggs are usually laid in water, where they can develop and hatch.

3. **Analyze the Options Given:**
- The options provided are birds (including apes), fishes, reptiles, and platypus.
- Birds and reptiles typically lay celiotic eggs, which have a hard shell.
- Platypus, while a mammal, also lays eggs but they are not non-celiotic.

4. **Determine Which Group Lays Non-Celiotic Eggs:**
- Fishes are known for laying non-celiotic eggs, as they release their eggs into the water where they develop.

5. **Conclude the Answer:**
- Based on the characteristics of the eggs and the groups of animals, the correct answer is that non-celiotic eggs occur in fishes.

**Final Answer: Non-celiotic eggs occur in fishes.**

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