The most common index
fossils are shells of invertebrates.
Give two reasons why this is so.

the most common index fossils are shells of invertebrates. give two reasons why this is so. Fusulinids make good index fossils. they are very abundant in marine sediment, widely distributed, and existed during a specific period in time.

Explanation:

learned in science class

i can't see the full page, therefore, can't answer it

explanation:

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this