If a new species is produced by the interbreeding of two members of distinct species, this would be ________ speciation achieved via ________.
A. allopatric; allopolyploidy
B. sympatric; allopolyploidy
C. sympatric; autopolyploidy
D. allopatric; autopolyploidy
E. sympatric; divergence
Answer: B
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In order for natural selection to occur within a population, certain conditions must be met. One such condition is
A. heterozygosity must be very low. B. frequent mutations that are inherited. C. phenotypic differences resulting from environmental conditions. D. phenotypic variations that are genetic. E. low rates of immigration.
The nuclear envelope is a single lipid layer.
Answer the following statement true (T) or false (F)
There are _____ microbial cells living on and in our bodies compared to the number of our body cells
a. ten times more b. ten times less c. about the same number of d. about half as many e. 100 times more
Identify each of the staining techniques as simple, differential, or special.
A. capsule stain B. acid-fast stain C. crystal violet D. Gram stain E. flagellar stain