Stacey got stung yesterday, and she has no idea by what. the hand she got stung on, which was on the side of her right hand, is all itchy. but if she itches it, or touches it, it sends a sharp burning sensation through her hand. her hand isn't swollen at all. what stung her?

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 shows the results that you would get if you tested beef using the four tests in the gizmo

How are fossils used to date organisms?