Archeopteryx a transitional fossil between birds and reptiles was discovered from the rocks of following period

Options

A. (a) Jurassic
B. (b) Archeozoic
C. (c) Cretaceous
D. (d) Triassic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the period during which the transitional fossil Archaeopteryx was discovered. Archaeopteryx is significant as it shows characteristics of both birds and reptiles.

2. **Identifying Archaeopteryx**: Archaeopteryx is known as the oldest fossil of a bird and serves as a connecting link between birds and reptiles. It possesses features of both groups.

3. **Features of Archaeopteryx**:
- **Bird-like Features**:
- Feathers
- Wings
- Hollow bones (which are characteristic of birds and aid in flight)
- **Reptile-like Features**:
- A long bony tail
- Teeth
- Legs similar to those of coelurosaur dinosaurs (which are reptiles)

4. **Determining the Correct Geological Period**:
- The options provided include different geological periods: Archaeozoic, Jurassic, Cretaceous, and Triassic.
- Archaeopteryx is known to have evolved during the late Jurassic period.

5. **Evaluating the Options**:
- **Option A: Jurassic** - Correct, as Archaeopteryx was discovered in this period.
- **Option B: Archaeozoic** - Incorrect, as this period is associated with the evolution of unicellular eukaryotes (protists).
- **Option C: Cretaceous** - Incorrect, as this period is known for the emergence of flowering plants (angiosperms).
- **Option D: Triassic** - Incorrect, as this period is marked by a mass extinction event.

6. **Conclusion**: The correct answer is **A: Jurassic**, as this is the period during which Archaeopteryx was discovered.

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