Which of the following statements is true about the structure of the cell membrane? a. the two layers of the plasma membrane are identical b. the plasma membrane is a rigid structure c. the proteins on the two layers are not identical d. proteins are found only on one surface of the membrane

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems

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. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.