Explain why the chromosomes in the second drawing have sister chromatids, but the chromosomes in the third drawing do not. what happened to the sister chromatids?

If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.