Species X and Y have very similar proteins and DNA. Species X and Z have very different proteins and DNA. What is more likely true about these three species?
a. Species X is older than either Species Y or Z
b. Species X is younger than either Species Y or Z
c. Species X and Y share a more recent common ancestor than species X and Z.
d. Species Y and Z are more closely related than species X and Z.

What did the first language sound like

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.