______ could not be involved in gene flow.
A. Hybridization between neighboring populations
B. Gametes dispersed by ocean currents
C. Disassortative mating within a population
D. Wind-blown pollen
E. Zygotes dispersed by ocean currents
C. Disassortative mating within a population
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Temperate grasslands and temperate deciduous forests are two different biomes that are located in the same latitudes. Which one of the following abiotic conditions is most likely to account for the differences in their community composition?
A. temperature B. precipitation C. sunlight D. soil nutrients E. a rain shadow
If two phenotypically normal parents have six children, and two daughters and two sons have the same genetic disorder, that disorder is most likely to be ____
a. hemophilia b. cystic fibrosis c. Marfan syndrome d. muscular dystrophy e. color blindness
In an egg, cytoplasmic localization of mRNA occurs when the transcripts
a. are bound to specific proteins. b. are small enough. c. are attached to fat soluble molecules. d. contain specific introns.
e. are attached to ribosome subunits manufactured in the nucleus.In order to maintain somewhat constant genetic frequencies, there must be
A. a relatively large population to prevent genetic drift. B. very low migration and mutation rates. C. random mating. D. All of these answers are true.