.The cell membrane consists of a lipid bilayer with embedded proteins. What is one reason that proteins are essential for the cell membrane to function properly? Proteins allow the cell membrane to attach to the cell wall.

Proteins prevent gases from passing through the cell membrane.

Proteins allow certain substances to pass through the cell membrane.

Proteins prevent the cell membrane from dissolving in water.

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?