A mutation can cause a defect in human hemoglobin which would result in this type of mutation

What are the two main phases of a cell cycle

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

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?