What is a common ancestor?

a. an animal that’s good at escaping from predators

b. an animal that is related to many other species

c. an animal from which two or more different species evolved.

d. an animal that has a lot of offspring.

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Which of the following forest management practices is best for reestablishing areas of forest?

Which material is commonly used as a culture medium for living cells