The methanobacteria, halobacteria, and sulfobacteria are included in which domain?
A) bacteria
B) protista
C) blue-green algae
D) archaea
E) eukarya
Answer: D
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What are atmospheric low pressure zones? Where are they found, and why are these zones significant for traditional marine navigation?
What will be an ideal response?
A thymine dimer affects the DNA molecule by
a. breaking it apart. b. distorting its structure. c. preventing effective DNA repair. d. interfering with base pairing. e. both b and c.
In DNA replication, the leading strand of DNA ________, while the other newly forming strand, called the lagging strand, ________
A) is synthesized in the 5' ? 3' direction; the new DNA is synthesized in the 3' ? 5' direction B) is synthesized in the 3' ? 5' direction; the new DNA is synthesized in the 5' ? 3' direction C) does not require an RNA primer; an RNA primer is required D) is synthesized as a continuous chain; the new DNA is formed in a series of short, discontinuous fragments E) is synthesized in a series of short, discontinuous fragments; the new DNA is synthesized as a continuous chain
Imagine that you conduct a phylogenetic analysis of sticklebacks and their relatives
You find that even though stickleback males are the only ones that show red coloration as a derived trait, female preference for red color is indeed found throughout the stickleback relatives. In sticklebacks, red color intensity in males is positively correlated with health, which led researchers to invoke the good genes model for the evolution of red coloration. Do your results change this conclusion in favor of sensory bias as an explanation? a. No, we can exclude sensory bias, as red coloration is still an honest indica-tor of male health. b. Yes, according to the new results the sensory bias model is the most parsi-monious explanation and good genes can be excluded. c. Not necessarily, one model does not exclude the other. d. If females have healthier offspring when they mate with red males, sensory bias can be excluded. e. A and D.