LIFE SCIENCE

Detailed explanation-1: -Fossils are the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers. Fossils also include any preserved trace of life that is typically more than 10 000 years old.

Detailed explanation-2: -Fossil: A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded, and preserved in the Earth’s crust, usually in stratified rock.

Detailed explanation-3: -Fossils are the geologically altered remains of a once-living organism and/or its behaviour. There are two main types: body fossils represent all or part of the organism’s body, and trace fossils show evidence of the organism’s behaviour.

Detailed explanation-4: -A trace fossil, also known as an ichnofossil ( /ˈɪknoʊfɒsɪl/; from Greek: ikhnos “trace, track"), is a fossil record of biological activity but not the preserved remains of the plant or animal itself.

Detailed explanation-5: -Stromatolites are the oldest known fossils, representing the beginning of life on Earth.