Which macromolecules have a basic unit that is composed of phosphate, a sugar ring, and one of five different base? A. proteins B. lipids C. nucleic acids D. carbohydrates

Where in the body can you find chemoreceptors? a. on the skin and ears, to detect pressure, touch, motion, and sound b. on the retina, to detect a single photon of light c. on the skin, to detect temperature or specific chemicals d. on the tongue and in the nose, to detect taste or odor

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Which group is noted for the independence of gametophyte and sporophyte generations from each other? a) ferns b) mosses, hornworts, and liverworts c) charophytes d) angiosperms e) gymnosperms