Which of the following would be least likely to fossilize?

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.

Nucleic acids offer variability because they contain alternate forms of genes called .

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast