Use the drop-down menus and what you know about index fossils to choose the correct answers.
Index fossils are the remains of organisms that lived on Earth for
periods.
First, geologists use relative age to determine the of the layers of rock.
They then use index fossils to relate the layers to those in
locations.

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

What could happen if two base pairs on a strand of dna or switched