What type of biomolecule is being produced at the ribosome? a. lipid b. protein c. carbohydrate d. nucleic acid

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm