Which of the following biological macromolecules can be either a double-stranded helix or simply single-stranded?
O lipids
O carbohydrates
O proteins
O nucleic acids

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Cells destroy body cells infected by a virus or bacteria.

To sciences do not agree on which type of grocery bag is better for the environment what is most likely to come out come out of the disagreement