A Mendelian test cross is used to determine whether
A) an individual is homozygous or heterozygous.
B) an allele is dominant or recessive.
C) segregation or independent assortment is occurring.
D) the genotype or phenotype is more important.
E) the flowers are purple or white.
A
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The major effect of excess water in the soil is
A. increase the level of oxygen. B. lower the amount of oxygen. C. reduce the pH. D. increase the amount of nitrogen.
In order to transfer gene a to an F- cell, the sex pilus must be in place for at least ____ minutes
a. 1 b. 2 c. 3 d. 4 e. 5
Name a place in the human body that is particularly acidic. Where are fluids close to neutrality? Where are fluids in the human body particularly basic?
What will be an ideal response?
Which statement is correct regarding microbial growth on food at refrigeration temperatures?
A. The absence of light in the refrigerator greatly reduces the growth of most microbial pathogens. B. There is no growth of microbes in food in the refrigerator; the cold temperature kills or inactivates microbial cells. C. Most food does not have enough oxygen content for microorganisms to thrive. D. The growth of microbes in food depends on their optimal growth temperature; some grow slowly and others faster.