The Primate order arose about ____ years ago, in the ___ period.
A. 60 million; Tertiary
B. 150 million; Jurassic
C. 100 million; Cretaceous
D. 10 million; Tertiary
E. 1 million; Quaternary
A. 60 million; Tertiary
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If you were to design a novel hydrophobic protein, which type of monomers would be most essential to incorporate in the molecule in order to achieve the desired result?
A. Amino acids with nonpolar side chains B. Purine-containing deoxyribonucleotides C. Amino acids with charged side chains D. Hydrophobic nucleic acids E. Polar amino acids
The most specific term usually used to describe a substance in a biological system that increases the rate of a reaction without being permanently changed by the reaction is a(n)
A. catalyzer. B. rate increaser. C. catalyst. D. enzyme.
Which factor is NOT characteristic of a city primarily plagued by industrial smog?
a. high concentration of sulfur oxides b. fossil fuels used for manufacturing c. cold, wet winters d. high concentration of nitrogen oxides e. large factories of heavy industry
If blue light is the component of the visible spectrum that can penetrate to the greatest depth in water, then what should be expected of photosynthetic protists that survive at great depths?
A) They should absorb blue light preferentially. B) They should absorb red light preferentially. C) They should reflect green light preferentially. D) They should absorb white light preferentially. E) They should absorb green light preferentially.