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

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Diffusion and osmosis are forms of passive transport