Which of the following are needed to form a triaclglycerol molecule?
A) 3 fatty acid molecules
B) 3 carbon rings
C) 3 phosphate groups
D) 3 glycerol molecules
E) 3 trans fats
Ans: A) 3 fatty acid molecules
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Ring species such as the greenish warbler complicate the biological species concept because (select all correct choices)
A. at least some of their populations are reproductively isolated from one another but can still exchange genetic material. B. at least some of their populations overlap spatially, but individuals in those populations do not interbreed with one another. C. individuals in at least some populations interbreed with individuals from other species. D. ring species comprise populations that are in the process of allopatric speciation. E. none of these
Chloroplasts are thought to have evolved from cyanobacteria. Which of the following observations support this hypothesis? (Select all correct choices.)
A. They both have similar internal membranes that organize the light reactions of photosynthesis. B. They both have small circular DNA genomes. C. They both have cell walls. D. They both have the capability of movement through flagella.
The first vaccinated organism was a
a. cow. b. rat. c. young boy. d. mouse. e. dog.
A toxin common to most Gram-negative bacteria is
A. neurotoxin. B. coagulase. C. lipid A. D. hemolysin. E. collagenase.