What is living fossils ? Give two examples.

Explanation

### Step-by-Step Solution:

1. **Definition of Fossils**:
- Fossils are the preserved remains or traces of ancient organisms that lived in the past. They are typically found buried in sedimentary rocks and provide evidence of life forms that existed long ago.

2. **Understanding Living Fossils**:
- Living fossils are organisms that have remained relatively unchanged over long geological periods and still exist today. The term "living fossil" refers to species that have a long geological history and are still found in their original form.

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