A parasitic protist that presents a major health problem to backpackers and hikers if they drink unfiltered stream or lake water is
A) Didinium. B) Giardia. C) Plasmodium. D) Trypanosoma. E) Pfiesteria.
B
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If you want your poinsettia to bloom in the summertime, you will have to change the
a. amount of water. b. length of day. c. temperature. d. type of fertilizer.
If a plant cell is placed in a hypotonic solution, the
a. entire cell will not swell or shrink. b. entire cell will shrink. c. turgor pressure will increase. d. cell wall prevents the cell from exploding. e. turgor pressure will increase, but the cell wall prevents the cell from exploding.
All of the following pea plant feature were favorable to the success of Mendel's experiments, except
A. true-breeding varieties were available. B. the plant can self-fertilize. C. the plant can be cross-fertilized. D. plant fertilization could be controlled artificially. E. the short life cycle of the pea plant.
Animals of the phylum ____ are likely to have an exoskeleton.
A. Mollusca B. Arthropoda C. Nematoda D. Chordata E. Annelida