Cell membranes are primarily made of a component that contains fatty acids. This component is most likely a... a. carbohydrate.
b. protein.
c. nucleic acid.
d. lipid.

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

When organisms convert from of energy, what usually results

Where can you find prokaryotic and eukaryotic cells?