Which options describe Darwin's theory of natural selection? Select all that apply. Natural selection results in descent with modification. Evolution occurs because of natural selection. Natural selection occurs because of evolution. Natural selection results in populations staying the same over time.

Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. his body responded by initiating a feedback mechanism to return his body to homeostasis. place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after calvin consumed the candy bar. a) calvin's blood glucose levels decreased. b) calvin's pancreas stopped secreting insulin. c) calvin's body cells started to take up glucose and store it as glycogen. d) calvin's blood glucose levels increased. e) calvin's pancreas started secreting insulin.

Which part of cellular respiration must occur before any of the other steps can occur

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?