What are two pieces of evidence that support the big bang Theory?

a.) red shift of light and cosmic background radiation

b.) red shift of light and the different shapes of galaxies

c.) planetary motion and cosmic background radiation

d.) planetary motion and the different shapes of galaxies

What is earths lithospheric plates interact at

Number and variety of living organism; includes genetic, species, and ecological types

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?