The chemical reaction illustrated in the accompanying figure _____
A) is a hydrolysis reaction
B) results in a peptide bond
C) joins two fatty acids together
D) links two polymers to form a monomer
E) joins two phospholipids in a bilayer
Answer: B
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Which statement best sums up our understanding of how animals navigate during migration?
A. The mechanisms have been worked out in great detail, from the genes involved, to the brain structures, to the resulting behavior. B. We have a thorough understanding of orientation but not navigation. C. We have some understanding of the information different animals rely on (sun, stars, or magnetic fields), and some sensory structures, but beyond that the mechanisms are still mysterious. D. Animal navigation is a complete mystery.
The production of antibiotics by microbes evolved so that
A. diseases could be cured. B. bacteria and viruses could be eliminated. C. the growth of other organisms sharing their habitat was inhibited, thus giving them a selective advantage. D. certain environments can be protected from pathogenic bacteria.
Visible light has a wavelength range of
A. 200-400 nanometers. B. 200-740 nanometers. C. 400-740 nanometers. D. 0.001-100,000 nanometers. E. 200-800 nanometers.
Discoveries by ____ led other scientists to reconsider the possibility that life most likely arose near hydrothermal vents on the sea floor.
A. Miller and urey B. Orgel and crick C. Starr D. Watson and crick E. Ballard