An adaptive radiation may be triggered after the demise of a successful group
a. True
b. False
ANSWER: True
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Which of the following would result in a decrease in the size of your ecological footprint?
A. purchasing produce from local farmers instead of produce shipped from overseas B. constructing a new home from brick and stone C. setting the thermostat to 68 degrees in the winter instead of 66 degrees D. only purchasing clothing that was made overseas E. None of the answer options are correct.
Imagine you conduct a parabiosis experiment with two strains of mice, one of which lacks a functional leptin gene (ob strain) while the other lacks a functional receptor for this hormone (db strain). Which of the following outcomes would you observe?
A. no weight change in the ob mouse B. no weight change in the db mouse C. increased body weight in the ob mouse D. decreased body weight in the ob mouse E. decreased body weight in the db mouse
During which process are two diploid cells produced?
a. meiosis I b. meiosis II c. mitosis d. interphase
All of the following are true about a partition coefficient except
A) it is the ratio of solubility in an organic solvent to solubility in water. B) it can be used to predict the probability that an amino acid is part of a transmembrane region of a protein. C) it is high for a molecule that readily crosses membranes by simple diffusion. D) it is the concentration at which the rate of transport is half maximal. E) it depends on the polarity of the molecule.