Which of the following factors does not affect membrane permeability? a) the saturation of hydrocarbon tails in membrane phospholipids b) temperature c) the amount of cholesterol in the membrane d) the polarity of membrane phospholipids.

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Across of blue x blue (both heterozygous) would result in

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d.higher