A general term used to describe groups based on mutual similarity or evolutionary relatedness is ________.
A. system
B. taxa
C. class
D. group
Answer: B
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Temperature is perhaps the most important factor in the distribution of organisms because
A. water is scarcer in warmer environments. B. most organisms are unable to regulate their body temperature precisely. C. many organisms are able to grow faster in warmer climates. D. the metabolic optimum for endothermic animals is in temperate areas. E. wind amplifies the effect of cool temperatures.
Which circumstance violates the conditions of the Hardy—Weinberg model?
a. the population is infinitely large b. the population is closed to migration from other populations c. no mutations are occurring d. all genotypes in the population survive and reproduce equally well e. nonrandom mating with respect to genotypes occurs between individuals
In India, golden jackals that have been expelled from their pack have been known to attach themselves to a particular tiger, trailing it at a safe distance in order to feed on the big cat's kills. What type of relationship exists between the jackal and the tiger?
A. mutualism B. predation C. parasitism D. competition E. commensalism Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about symbiotic relationships? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Generally speaking, what are the methods available to the econometrician who wants to estimate a linear model with a fixed effects model design (i.e., dummy variable for individual units observed over multiple periods)?
A. Within Estimator and Fixed Effects regression B. Within estimator and instrumental variable regression C. Diff-in-diff and Two-stage least squares D. Two-stage least squares and Fixed Effects regression