GEOLOGY

Detailed explanation-1: -Fossilization usually occur in organisms with hard, bony body parts, such as skeletons, teeth, or shells. Soft-bodied organisms, such as worms, are rarely fossilized. Sometimes, however, the sticky resin of a tree can become fossilized.

Detailed explanation-2: -Soft parts, in contrast, are usually lost through scavenging and decay. In rare cases the soft (i.e., non-biomineralized) parts of animals survive and are fossilized alongside the hard skeleton, and even wholly soft-bodied organisms (those without biomineralized tissues) can be preserved.

Detailed explanation-3: -The fossil record is heavily biased towards the preservation of harder parts of organisms, such as shells, teeth, and bones, as the soft-parts such as internal organs, eyes, or even completely soft organisms, such as worms, ordinarily decay away before they can be fossilised.

Detailed explanation-4: -Preserved remains – Shells, bones, and teeth are the most commonly preserved body parts of fossilized organisms. Soft body parts, such as skin and hair, are less likely to be preserved as fossils.