When differences in the phenotype due to the environment can be ignored:
A. the environmental component of a
complex trait can be more easily identified.
B. the genetic variation underlying phenotypic
differences can be more easily identified.
C. the trait is not considered a complex trait.
D. epistatic interactions determine
phenotypes.
E. All of these choices are correct.
B
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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.
Which body of evidence is least supportive of plate tectonics theory?
a. the worldwide fossil record b. the global distribution of existing species c. the sea-floor spreading d. the shape of the continents e. the size of the oceans
The use of salt and sugar in preserving various types of foods is an application of which of the following concepts?
A) nitrogen fixation B) osmotic pressure C) pH D) hydrostatic pressure E) quorum sensing
Which organ is central to the body's metabolism of nutrients?
A) the kidneys B) the stomach C) the liver D) the small intestine