CO2 is an example of which type of bond?
metallic
ionic
covalent
O polar bonding

the trilobite is used as an index fossil for various geologic time periods as specific types of the trilobites were present in different geological time periods. they are a group of marine arthropods belonging to the class of trilobita.

explanation:

because photosynthesis could not occur (apex)

answerclassical conditioning;