Which of the following cell membranes is the most fluid? Membrane A, because it is composed of saturated fatty acids that have one or more cis bonds that form stable aggregations

Membrane A, because it is composed of saturated fatty acids that lack weak hydrogen bonds that continually break and reform to permit macromolecule movement

Membrane B, because is it composed of unsaturated fatty acids that form weak covalent bonds at the site of their cis bonds, which permit easy movement

Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing

Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).