The rhythmic contractions of the stomach and intestine that propel food along are called

Nucleic acid certain protein cell membranes certain carbohydrates

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what

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?