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

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.

The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old