Which type of skeletons do invertebrates such as crabs have? a. endoskeleton b. exoskeleton c. articulated d. arthropoidal

Match with o for organic and i for inorganic for each compound

What is the most important inorganic material for livings things? ! due tomorrow!

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping