Which of the following is correct about hotspots of biodiversity?
A. Hotspots are islands recently formed by volcanic eruptions in the ocean's crust.
B. Hotspots are home to many endemic species.
C. Northeast Ohio is an example of a hotspot of biodiversity.
D. Hotspots describe densely populated urban areas.
E. All of the above are correct.
Answer: B. Hotspots are home to many endemic species.
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The bacterium Deinococcus radiodurans is able to withstand the damage incurred by exposure to very high levels of ? irradiation. This exposure introduces many double-stranded breaks that are repaired within hours
Which of the following is a key component of this rapid repair mechanism? A. RecA B. extended synthesis-dependent strand annealing (ESDSA) C. synthesis-dependent strand annealing (SDSA) D. double-strand break repair (DSBR) E. XerCD
Which of the following pollinators would likely visit a flower that is relatively simple in design and smells like rotting carrion?
A) Moths and butterflies B) Beetles C) Butterflies D) Hummingbirds E) Bees
The molecule directly responsible for breaking down cAMP to inactive AMP is
A. phosphodiesterase. B. protein kinase A. C. protein phosphatase. D. adenylyl cyclase. E. GTPase.
Approximately ________ years ago, atmospheric oxygen reached its current concentration (i.e., ~21 percent)
a. 100–500 million b. 600–900 million c. 1–2 billion d. >2 billion