Help plzzz Vasodilation

If the core temperature of the body starts to , then the smooth muscle in the arteriole walls and the arteriole dilates (gets wider)

blood then flows through the capillaries near the surface of the skin.

This the rate of heat loss from the body.

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Who invented the first threshing machine