Which gene pair is closer together; i.e. there are fewer map units between them?
A) a ? b
B) b ? c
C) a ? c
D) a ? b and b ? c are the same length
E) a ? c and b ? c are the same length
A
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DNA probes have been very useful in
A. coding the DNA of organisms grown in vivo. B. identifying organisms in pure culture. C. detecting toxins. D. diagnosing diseases of protozoa.
The main benefit to a plant from a mycorrhizal association is ____
a. enhanced water uptake b. removal of excess carbohydrates c. enhanced flow of carbohydrates to the roots d. enhanced mineral ion uptake e. enhanced protection of roots from bacterial infections
Oceanic trenches form primarily where one crustal plate sinks below another
Indicate whether the statement is true or false.
In maize, a "mutable" allele results from
a. the loss of an autonomous transposon. b. the insertion of an autonomous transposon. c. the loss of a nonautonomous transposon. d. the loss of the ability of an autonomous transposon to transpose. e. the insertion of a nonautonomous transposon.