Why are fossils considered to be an incomplete record of evolution?

Fossils are leftovers of biotic entities that have been preserved in sediments. The fossil record is crucial to the understanding of evolution and the history of life.

Explanation:

The fossil record is biased for organisms that had hard shells and skeletons.

Also, The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years. Hard, bony body parts are most likely to be fossilized (such as teeth, bones and shells). Thus, soft-bodied or cellular organisms such as invertebrates or prokaryotes are the most unlikely to be fossilized and underrepresented in the fossil record.

Option- 3

Explanation:

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.