The permeability of a biological membrane to a specific polar solute may depend on which of the following?

the amount of cholesterol in the membrane

the types of transport proteins in the membrane

the phospholipid composition of the membrane

the presence of unsaturated fatty acids in the membrane
the types of polysaccharides present in the membrane

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.

i think the answer would be a. after sentence 14! i hope i at least a little