The diagram shows a tiny opening in a plant leaf. Which three materials are exchanged with the environment through tiny openings such as this one

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

The pronunciation aid that determines the stress placed upon a syllable is the

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation