Which of the following can help to determine the age of a fossil?
a. Shape of the fossil b. Orientationof body part c. Location of the fossil d. Size of the fossil

Name the glands associated with human digestive system

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Define adaptation. why do organisms adapt? give an example.