If one cell is isolated and all the cytosine molecules are labelled with a radioactive tag and then allowed to undergo DNA replication with normal nucleotides, how much radioactive cytosine would be found in the daughter cell DNA and in the next generation’s DNA?

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

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 .