Species a Is Divided by a Newly Formed River to Become

question 32

Multiple Choice

Species A is divided by a newly formed river to become two populations.These populations diverge to become two different species,B and C.If the river is dammed upstream,eliminating an isolating mechanism between B and C,what will happen?

• A)Gene flow will resume.
• B)Species B and C will be considered subspecies.
• C)Species B and C will remain genetically isolated.
• D)Species will unite to form a hybrid species, D.

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