Water dissolves a wide variety of substances, including many substances that cells need to survive. Which statement best explains this property of water? A. Water molecules are polar, which allows them to form hydrogen bonds with one another and attract other substances.
B. Water molecules are nonpolar, which allows them to move quickly from place to place.
C. Water molecules are polar, so they form ionic bonds with other substances.
D. Water molecules are nonpolar, so they form covalent bonds with other substances.

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.

What did you notice about the onion root tip cells that you saw at 40x power?

Amembrane protein is made and inserted into the membrane of the rough endoplasmic reticulum. a binding site that is present in this protein is aligned so that it faces the lumen of the er. if this protein is then moved to other endomembranes, at which surface of the membranes given below is this binding site unlikely to be found? a. internal face of the golgi apparatus membranes b. the internal face of lysosome membrane c. facing the intermembrane space of the nuclear envelop membranes d. the lumen face of the vesicle just derived from the golgi apparatus e. the cytosolic face of the plasma membrane