All of the following are associated with the streak plate method of isolation EXCEPT:
a) a solid medium in a Petri dish
b) colonies growing at and below the surface of the medium
c) a sterile inoculating loop or needle
d) isolation of CFU's from one another
Answer: b) colonies growing at and below the surface of the medium
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Natural selection, as a mechanism of evolution that acts on variants within populations and ultimately leads to the evolution of different species, was proposed by
A. Malthus. B. Mendel. C. Founder. D. Lyell. E. Darwin.
At __________, the fusion of two gametes produces a __________
Fill in the blank(s) with the appropriate word(s).
Which of these is an example of sister chromatids?
a. Replicated chromosomes held together at the centromere b. Maternal chromosome 1 and paternal chromosome 3 c. X and Y chromosomes d. Maternal chromosome 1 and paternal chromosome 1
How is most carbon dioxide transported in the blood?
A. on the free hemoglobins since they have lost their oxygen in the tissues B. as bicarbonate ions (HCO3) C. as carbon monoxide D. as carbon compounds and oxygen radicals E. as gas bubbles of CO2, just as in carbonated soft drinks