Bio1BPractice2002 evolution

Bio1BPractice2002 evolution - Biology 1B Thomson 1...

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Biology 1B Evolution practice questions Fall 2002 Thomson 1. Evolution is often described as “the theme that ties together all aspects of biology.” This is because the process of evolution A. explains how organisms become adapted to their environment. B. explains the diversity of organisms. C. explains why all organisms have characteristics in common. D. explains why distantly related organisms sometimes resemble one another. E. all of the above are appropriate answers. 2. Evidence of a unitary origin of life comes from: A. analogous traits. B. homologous traits. C. examples of sexual selection. D. examples of convergent evolution. E. none of the above give evidence of a unitary origin of life. 3. Which of the following is an example of an evolutionary adaptation? A. a change in frequency of a neutral allele by genetic drift. B. constancy in the rate of accumulation of genetic changes in a molecule over time. C. the loss of an allele in a population due to a population bottleneck. D. fixation in a population of a selectively advantagous allele. E. none of the above is an example of an evolutionary adaptation. 4. Which of the following is not an example of an evolutionary adaptation: A. the cryptic appearance of the moth Abrostola trigemina , which looks like a broken twig. B. the appearance of the leafy sea dragon (a sea horse) which looks so much like the kelp (seaweed) in which it lives that it lures prey into the seeming safety of the kelp forest and then eats them. C. the long, broad wings of the red-tailed hawk that allow it to sustain a gliding flight over open country while it searches for prey with its keen eyes. D. the rounded body shape of the sargassum crab which resembles the floats of the brown alga Sargossum in which it lives. E. all of the above are examples of adaptations. 5. One example of coevolution is that between A. birds and bees. B. flowering plants and insects. C. dinosaurs and mammals. D. humans and other primates. E. worms and fishes. 1 .
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6. Many orchid plants attract specific species of male insects - either a bee, fly or wasp - by a modification of one of their three petals to look like a female insect, together with production of a scent that mimics the attractant sex pheromone (scent) of the female. As the insect “mates” with the flower (a phenomenon termed pseudocopulation) a pollinium is attached to it by a sticky disc. The pollinium is attached to the insect such that it will contact the stigma of the flower visited next by the insect. This is an example of: A. Mullerian mimicry. B. Batesian mimicry. C. sexual selection. D. adaptation. E. balancing selection. 7. What characterizes a prokaryotic cell? A. the presence of mitochondria. B.
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This note was uploaded on 10/14/2010 for the course BIO 1B taught by Professor Carlson,mischel,power during the Fall '07 term at Berkeley.

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Bio1BPractice2002 evolution - Biology 1B Thomson 1...

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