Archaea and bacteria are involved in which of the following cycles? (Select all correct choices.)
A. the nitrogen cycle
B. the carbon cycle
C. the sulfur cycle
A,B,C
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The ultimate electron acceptor in aerobic respiration is
a. NAD+. b. CO2. c. ADP. d. NADP+. e. O2.
The first phylum with three germ layers is
a. Cnidaria. b. Platyhelminthes. c. Annelida. d. Arthropoda. e. Nematoda.
How did Meselson and Stahl rule out the conservative model of DNA replication using equilibrium density gradient centrifugation?
What will be an ideal response?
Imagine you are working for the Florida Public Health Department and you have been assigned the task of preventing malaria from spreading throughout the southern Everglades. Which of the following scenarios would have a chance of success?
A. devising an insect repellant that would prevent the Anopheles mosquito from biting a human host B. developing a vaccination that would prevent the ability of the merozoites to reproduce within the host's bloodstream C. spraying the edges of the Everglades with a pesticide that will kill mosquitos D. All of these scenarios would have a chance of success in preventing malaria from spreading throughout the southern Everglades.