Select the feature that best describes cell membranes helps cell move through fluid habitats
b.
physically separates an external environment from an internal one
c.
contains ribosomes
d.
involved in binding to signaling molecules

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

Most of the carbon on earth is stored in the form of

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits