GEOLOGY

Detailed explanation-1: -Organisms with hard parts (bones, shells) have a good chance of fossilization while soft-bodied organisms are rarely fossilized. The enamel and dentin of teeth are harder than bone and as a result, teeth are more likely to be fossilized than other parts of a vertebrate.

Detailed explanation-2: -The hard parts of organisms, such as bones, shells, and teeth have a better chance of becoming fossils than do softer parts. One reason for this is that scavengers generally do not eat these parts. Hard parts also decay more slowly than soft parts, giving more time for them to be buried.

Detailed explanation-3: -Organisms with soft parts are rarely preserved because the soft tissue rapidly decomposes. Hard parts such as bones and shells are more readily fossilized.

Detailed explanation-4: -Fossils are preserved by three main methods: unaltered soft or hard parts, altered hard parts, and trace fossils.

Detailed explanation-5: -Calcium phosphate (hydroxylapatite) bones, teeth, and scales: the hard parts of vertebrates. Chitin: the firm parts of most arthropods (insects, crustaceans, etc.) Keratin: a common firm part in fungi and animals, including hair, feathers, nails.