Which of the following is not a member of the phylum Platyhelminthes?
a. fluke
b. tapeworm
c. flatworm
d. ribbon worm
D
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Water distribution systems contain
A) very few bacteria or other microorganisms. B) biofilms that may harbor opportunistic pathogens. C) numerous grazing protists that consume bacteria. D) biofilms that may harbor opportunistic pathogens and numerous grazing protists that consume bacteria.
At what phase of the cell cycle does p53 halt cell division if it senses DNA damage?
A. S B. G2 C. M D. G0 E. G1
Based on the 1:2:1 proportions of carbon, hydrogen, and oxygen, it can be determined that the glucose molecule is a(n)
Examine this image of the glucose molecule.
A. triglyceride.
B. carbohydrate.
C. polymer.
D. amino acid.
E. disaccharide.
Which of the following is not true about yeast?
A. Yeast are larger than most bacteria. B. Yeast possess eukaryotic organelles. C. Yeast contain two or more nuclei. D. Yeast reproduce either asexually by budding or sexually through spore formation.