Which example illustrates darwin's main contribution to the theory of evolution? a. an agricultural pest has been exposed to a pesticide that wipes out the entire species. b. in a laboratory, a scientist chooses the most intelligent mice and breeds them to advance the species. c. when exposed to antibiotics, most bacteria in a population die but some survive and live to reproduce. d. in the african savannah, a scientist observes that a wildebeest calf has inherited its coat pattern from its father.

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.

Quick asap will give brainiest ! what best describes the same pattern of tides on earth throughout the day? neap tides spring tides semidiurnal tides nocturnal tides

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.