Question

Diagram of 4 outcrops. Organism A is a spiral shaped shell, organism B is a trilobyte, organism C is a fan shaped shell, organism D is a tube shaped shell. Outcrop 1: bottom layer shows organism B; second layer shows organisms C and B; third layer shows organism A; top layer is empty. Outcrop 2: bottom layer shows organism C; second layer shows organisms B and C; third layer shows organisms A and C; top layer shows organism C. Outcrop 3: bottom layer is empty; second layer shows organisms B and C; third layer shows organism A; top layer shows organism B. Outcrop 4: bottom layer shows organism B; second layer shows organism C; third layer shows organisms A and B; top layer shows organism D.

Answer the questions about the diagram.



Organism

appears in the least outcrops.



Organisms

are the oldest.



Organism

would make the best index fossil.



i need it answered please ;)

Answer 1

Organism C appears in the least number of outcrops. Organisms B and C are the oldest. Organism D would make the best index fossil.

Step-by-step explanation:

Organism C appears in the least number of outcrops, as it is found only in Outcrop 2, Outcrop 3, and Outcrop 4. Organisms B and C are the oldest, as they are found in all four outcrops. Organism D, the tube-shaped shell, would make the best index fossil, as it is found only in the top layer of Outcrop 4, making it a good marker for a specific time period.