Which process can lead to speciation?

a. over time populations may differ only in coat color or limb length.

b. over time two populations will occasionally interbreed.

c. two populations become reproductively isolate; no inter-mating occurs.

d. over time two populations may differ in their diet and behavioral adaptations but can still mate and produce offspring.

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?

Based on her survey, which advertising mediums will work best to publicize leslie's in-store specials?

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.