A fossil is found in a given rock strata. Which of the following would give the best information about its age?
a. The mineral composition of the strata.
b. The density of the strata.
c. The depth of the strata.
d. The water content of the strata.
e. The location of the strata.
What will be an ideal response?
Answer: c
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Because artificial selection is controlled by a breeder, how does it compare to natural selection?
A. It usually occurs at the same pace because mutations occur at the same rate. B. It usually is less efficient because there is no competition between individuals. C. It usually is more efficient because it is controlled through breeding and not reproductive success. D. It works well, but will only be able to produce a range of phenotypes based on the initial variation seen within the initial population. E. It works equally well, because both principles use the idea of hereditary traits to pass along variation to offspring.
Which of the examples below are polymorphic traits? Select all that apply.
_____ Hair loss in malnourished, captive chimpanzees. _____ A population of lilies that contains equal proportions of both blue and white flowering individuals. _____ The A, B, and O blood types found in humans. _____ Lactose tolerance and intolerance in humans. _____ The change from white coat in winter to brown coat in summer in Arctic fox populations.
What is formed between the two nucleoids created during binary fission?
a. septum b. cell plate c. cleavage furrow d. fissure
If you place an organism classified as a photoautotroph at the bottom of a lake and later see that it is able to acquire nutrients from dead plant material, you can conclude the photoautotroph is actually a
A) photoheterotroph. B) chemoautotroph. C) chemoheterotroph. D) mixotroph.