Which one of the following is an example of epithelial tissue?
a. app neuroses
b. subcutaneous skin layer
c. lining of the digestive tract
d.

Where does the information about where each transcription factor binds originate?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow