The data in the previous graphs indicate that _____
A) a hybrid zone was established after the completion of the bridge
B) there was no migration between the two squirrel populations after the bridge was completed
C) gene flow occurred from one type of squirrel into the gene pool of the other type of squirrel
D) two-way migration of squirrels occurred across the bridge, but without hybridization
E) some northern squirrels migrated south, but no southern squirrels migrated north across the bridge
Answer: D
You might also like to view...
The venom of black widow spiders (Latrodectus mactans) contains an enzyme that hydrolyzes lecithin to the phospholipid lysolecithin. The lysolecithin lyses red blood cells, destroying them. One possible mechanism whereby lysolecithin disrupts the plasma membranes of red blood cells is that it
A) is toxic to red blood cells. B) may act in a manner similar to detergents. C) binds calcium ions, compromising membrane integrity. D) acts as a second messenger to stimulate apoptosis. E) None of the above is a possible mechanism.
Identify the ion from below.
A. Ca2+. B. He. C. H2. D. CO2. E. KCl-.
Who demonstrated that phage genetic material is DNA and not protein?
A. Avery, MacLeod, and McCarty B. Hershey and Chase C. Chargaff D. Franklin E. Watson and Crick
If the foods preferred by each species are found on different parts of the island, and if the flies mate and lay eggs on their food sources, regardless of the location of the food sources, then the speciation events involving these fly species may have been driven, at least in part, by which of the following?
A) autopolyploidy B) allopolyploidy C) species selection D) genetic drift E) habitat differentiation