Which of the following statements accurately describes enzymes? a. many different types of substrates with different shapes can bind to a single enzyme. b. enzymes increase the activation energy of reactions. c. enzymes slow chemical reactions. d. temperature and ph can affect how enzymes work.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

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 anatomical plane is the only one that could not show both the sternal region and vertebral region