The kangaroo rat gets the bulk of its water from
a. drinking liquids.
b. absorption through its skin.
c. ingesting food.
d. oxidative reactions in its cells.
e. reuptake of water from urine.
D
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Some traits evolve for one particular function, but then become co-opted for another function. For example, it is hypothesized that bird feathers originally evolved for thermoregulation/insulation, but then later became adapted for flight
In the text it is suggested that evolution of group hunting resulted in a brain that is able to play the piano or solve calculus problems. Please support or refute this statement. What will be an ideal response?
Which of the following statements about TSEs (transmissible spongiform encephalopathies) is false?
A. TSEs include scrapie in sheep, mad cow disease, chronic wasting disease in deer and elk, and kuru and variant Creutzfeldt-Jakob disease in humans. B. The incidence of Creutzfeldt-Jakob disease in humans increased after an outbreak of mad cow disease in England, suggesting that mad cow disease may be transmitted to humans. C. Viroids are the likely cause of TSEs. D. TSEs do not seem to be affected by treatments that would eliminate nucleic acid-based diseases. E. Infectious TSE preparations do not seem to contain DNA or RNA.
The mosaic effect of X inactivation in human
females can be observed in a. skin color. b. hair color. c. fingernails. d. distribution of sweat glands. e. all of these
Stanley Miller's 1953 experiments supported the hypothesis that _____
A) life on Earth arose from simple inorganic molecules B) organic molecules can be synthesized abiotically under conditions that may have existed on early Earth C) life on Earth arose from simple organic molecules, with energy from lightning and volcanoes D) the conditions on early Earth were conducive to the origin of life