Trisomy of the X chromosome has little effect on the health, whereas trisomy of any of the autosomes has significant detrimental developmental effects. What could account for this difference in effect of trisomy between the X chromosome and any of the autosomes.

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?

How dose plate tectonics effect climate

Modern computers can store about as much information as the human brain. true false its false i took the test