In genetic terms, what indicates that natural selection is occurring in a population? A. A change in the gene pool of a species B. Changes in individual organisms in a population
C. The frequency of alleles in a population staying the same over time
D. Change in the relative frequency of alleles in the population's gene pool over time

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Which food could be transported in a galvanized metal container?

Which organ controls breathing? lungs alveoli heart diaphragm