Genes at one locus that affect the expression of genes
at a different locus are said to be
a. epistatic.
b. linked.
c. codominant.
d. penetrant.
e. alleles.
Answer: a
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In Griffith's experiments,
A. mice infected with live nonvirulent bacteria developed pneumonia and died. B. nonvirulent bacteria transformed the virulent bacteria into a nonvirulent variety. C. mice infected with heat-killed virulent bacteria and live nonvirulent bacteria developed pneumonia and died. D. mice infected with heat-killed virulent bacteria and heat-killed nonvirulent bacteria developed pneumonia and died.
Escherichia coli is found naturally in the intestines of birds, humans, and animals
Indicate whether the statement is true or false.
When ATP energizes biochemical reactions, it transfers its ________ to the molecule being made more reactive
a. outermost phosphorous atom b. outermost phosphate group c. ribose d. adenine
Global warming due to the greenhouse effect may be
A) moderated by photosynthesis, which removes carbon dioxide from the atmosphere. B) made worse by photosynthesis, which adds carbon dioxide to the atmosphere. C) reduced by the burning of fossil fuels, which removes oxygen from the atmosphere. D) of little concern, since it is part of the normal cycle for the planet.