Question

Suppose a fern fossil is found between layer Y and layer z during which time range with fern fossil most likely have formed?

A.2-10 million years ago
B.10-30 million years ago
C.30-50 million years ago
D.50-70 million years ago

Answer 1

Answer: C. 30 - 50 million years ago

Step-by-step explanation:

Fossils found in layer Y formed 30 million years ago according to the graph above. Similarly, fossils found in layer Z formed 50 million years ago.

If a fossil (fern fossil) is found between layer Y and layer Z, it means that it formed between the years that the fossils in layers Y and Z formed which is 30 - 50 million years ago.