All cells contain cell membranes. which of the following describes the composition of cell membranes?
a. cell membranes are composed of carbohydrate chains, which allow all materials to enter and leave the cell.
b. cell membranes are composed of cellulose, which provides rigidity for the cell.
c. cell membranes are composed of cytoplasm, which allows proteins to be excreted by the cell.
d. cell membranes are composed of lipid molecules, which provide a flexible structure.

What is the importantence of the carbon and nitretan cycles in the environment

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box