The Reznick and Endler guppy study showed that life history traits in guppies ____.
A. evolve primarily due to migration patterns
B. are unpredictable and random from a human standpoint
C. change very slowly, and only in response to individual guppy needs
D. are unchanged in response to the preferences of predators
E. can evolve rapidly in response to the preferences of predators
Answer: E
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What is generally true about biomass and energy as we move from one trophic level to the next?
A. They both increase. B. Organisms at one trophic level always consume all of the resources from the level below them. C. Not all energy is transferred to the next trophic level. D. All of the energy stored initially in organic molecules by the primary producers will be available to the secondary consumers. E. Biomass increases but energy decreases.
Ricin is
a. a substance found in castor bean seeds. b. a polysaccharide extracted from rice. c. an ingredient in many paints and cosmetics. d. a protein that inactivates ribosomes. e. a substance found in castor bean seeds and a protein that inactivates ribosomes.
In 2009, Nadya Suleman, gave birth to
a. pentuplets. b. sextuplets. c. octuplets. d. the first human clone. e. none of these
If a chloroplast coding sequence has been transferred to the nuclear genome, but the protein product is needed in the chloroplast, what must be added to the original polypeptide sequence?
What will be an ideal response?