Which type of microfossils have a tooth-like shape made of apatite, are a mouth part of an extinct swimming eel-like chordate, and are useful index fossils for the Paleozoic through Triassic?
A)acritarchs and dinoflagellates
B)coccoliths and formaminifera
C)conodonts
D)diatoms and radiolaria

Question

Quizplus · Accepted Answer

The tooth-like shape made of apatite describes conodonts, which are the mouth parts of an extinct swimming eel-like chordate. They are useful index fossils for the Paleozoic through Triassic. Acritarchs and dinoflagellates, coccoliths and foraminifera, and diatoms and radiolaria are all different types of microfossils, but they do not match the description given.

Which Type of Microfossils Have a Tooth-Like Shape Made of Apatite