Living fossils is

Options

A. Ginkgo biloba
B. Gnetum ulva
C. Pinus roxburghii
D. Cycas revoluta

Answer

**Step-by-Step Solution:**

1. **Definition of Living Fossils**: Living fossils are organisms that have remained relatively unchanged over millions of years. They exhibit little to no evolutionary change from their ancestors.

2. **Characteristics of Living Fossils**:
- They do not show significant evolutionary adaptations or new traits over time.
- They are often the sole survivors of their lineage, meaning there are no closely related species that have evolved from them.

3. **Examples of Living Fossils**:
- **Ginkgo biloba**: This plant species is often referred to as the oldest living species. It has not changed significantly in structure or form over millions of years and has no close relatives.
- **Horseshoe crab**: Another example from the animal kingdom, which has also remained largely unchanged for millions of years.

4. **Conclusion**: Living fossils provide insight into the evolutionary history of life on Earth, showcasing species that have survived through time without significant changes.

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