Which of the following was derived from an ancestral free-living bacteria? Lysosome
Chloroplast
Vacuole
Golgi Apparatus

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.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

What will happen if two of the base pairs of the stand of the dna are switched