Theoretically, which would be the most effective way to disrupt
a Hadley cell?
A) Remove all equatorial moisture and convection.
B) Extensively water the deserts.
C) Heat the poles.
D) Shift the Sun to apply direct rays 30 degrees south latitude.
Answer: A
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This sequence of questions is designed to help students understand the critical role bacteria and archaea play in the sulfur and nitrogen biogeochemical cycles. No one organism can perform all the reactions in the cycle
Some of these reactions are solely catalyzed by microbes, solidifying their necessity and importance in supporting all life on Earth. Consider the chemical reactions of the sulfur cycle shown in Figure 26.10 and the nitrogen cycle shown in Figure 26.11. Oceans constitute the most significant reservoir of sulfur in the biosphere, and sulfate (SO4 2- ) reduction is the most predominant form of anaerobic respiration in marine environments. In such cases, oxidized sulfur compounds like SO4 2- are the electron acceptors instead of what? A. water B. oxygen C. hydrogen D. carbon dioxide
Match the following items with the correct phrases.
_______1. The width of a typical coccus. _______2. The resolving power of the unaided eye. _______3. The resolving power of the scanning electron microscope. _______4. The resolving power of the transmission electron microscope. _______5. The resolving power of the compound light microscope. a. 0.2 nm b. 20 nm c. 0.2 ?m d. 1 ?m e. 0.2 mm
In a typical application, a DNA microarray is used to compare the ____________________
a. expression of genes in two different tissues b. alleles of each chromosome c. length of DNA fragments in yeast vectors d. changes in gene sequences within an allele through generations of a single family e. protein products produced when using different DNA sequencing techniques
Sarah observed that the mystery pond organisms never come up to the pond's surface. If she catches one of these organisms and observes closely, perhaps dissecting the organism, she should find _____
A) gills B) spiracles C) tracheae D) book lungs