Light ray 1 strikes the surface, separating air and water as shown below. Which of the following is the refracted ray for ray 1?

Ray 2
Ray 3
Ray 4
None, ray 1 is not refracted

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy

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?