Which word can amoebae go through a process in which they can join together?

a. organisms
b. aggregate
c. cellular
d. function

i will mark !

b. aggregate

explanation:

when there is no food available for the social amoebas, they will aggregate. by aggregating, the separate amoebas can join together to create a larger organism that can move to a new place that has more food.

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:

the most logical answer would be a