In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of ________
A) satellited chromosomes
B) Y chromosomes
C) X chromosomes
D) chromomeres
E) centromeres
C
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Mutants that are lacIS do not produce lac enzymes, regardless of the presence or absence of lactose
Indicate whether the statement is true or false
Accommodation enabling us to switch from focusing on something nearby to something more distant is accomplished by the ________ muscle
Fill in the blank(s) with correct word
Frequently, a group of related species will each have a unique courtship ritual that must be performed correctly for both partners to be willing to mate. Such a ritual constitutes a ________ and ________ reproductive barrier
A) mechanical; postzygotic B) behavioral; prezygotic C) temporal; prezygotic D) gametic; postzygotic
Dead leaf tissue on plants is a condition called:
A. necrosis B. hyperpigmentation C. viral mosaicism D. leaf injury E. none of the above