Remember that color is an inherited trait in beetles. Which of the following is an example of natural selection?
A. Green beetles leave more offspring than brown beetles because they are better at finding food.
B. Green beetles migrate out of the population.
C. Green beetles and brown beetles always leave the same number of offspring.
D. A storm kills more green beetles than brown beetles by chance.
E. Green beetles migrate out of the population, and brown beetles migrate into the population.
A. Green beetles leave more offspring than brown beetles because they are better at finding food.
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When E. coli is lysed:
A. circular chromosomal DNA is released. B. circular plasmid DNA is released. C. both circular chromosomal and circular plasmid DNA are released. D. chromosomal DNA remains within the cell wall while most cellular contents are released. E. both circular chromosomal and circular plasmid DNA remain within the cell wall while most cellular contents are released.
Suppose you explored a new planet and found a photosynthetic organism unlike any on Earth. You repeat
Engelmann's classic experiment using this new organism in place of Spirogyra and find that oxygen-dependent bacteria cluster near the green and yellow portions of the spectrum. What does this tell you?
a. The sun of this new planet emits different wavelengths of light than our own. b. This new organism is using yellow and green light to drive photosynthesis. c. This organism appears green, just like plants on Earth. d. This organism utilizes the most energy-rich photons of the spectrum. e. This new organism is using blue and red light to drive photosynthesis.
What is the name of the enzyme that forms nitric oxide?
a) nitrous oxide hydrolase b) nitric oxide dismutase c) nitric oxide synthase d) nitric oxide oxidase
A particular ________ carry the information for making a particular protein, but ________ can be used to make any protein
A) ribosome and mRNA; a gene and a tRNA B) gene and ribosome; a tRNA and an mRNA C) gene and mRNA; a ribosome and a tRNA D) gene and tRNA; a ribosome and an mRNA E) tRNA and ribosome; a gene and an mRNA