In most cases, the final product of sulfur oxidation is
A) hydrogen sulfide.
B) elemental sulfur.
C) sulfate.
D) thiosulfate.
Answer: C
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Many eukaryotic operons are subject to numerous regulatory mechanisms
Indicate whether the statement is true or false.
Studying the Sepia apama cuttlefish, Hanlon, Naud, and their colleagues observed that most success in producing fertilized eggs was attributed to the males guarding mated females from subsequent mating attempts by other males. What additional behavior contributed to successful production of fertilized eggs?
A. As opportunistic hermaphrodites, smaller males were able to mate and reproduce as females. B. Smaller males distracted larger males for more than 40 minutes, past the viability of their sperm, and then the smaller males mated with the females. C. The sparse population density of Sepia apama cuttlefish results in lower but equal reproductive successes among smaller and less aggressive males. D. Smaller, less aggressive males used mimicry of females to approach guarded females repeatedly to mate. E. All of the answer choices are correct.
Pfiesteria piscicida is a toxic algal form that is associated with neurological disease symptoms.
a. true b. false
Scientists cannot predict when an El Niño will begin. But once it does, forecasters are able to predict changes to weather patterns. What would be a predicted weather effect of an El Niño?
A. Colder than normal across the northeastern United States B. More rain in Peru and Ecuador C. Drier and warmer in the southeastern United States D. More rain in Indonesia and the Philippines