In the absence of geographic barriers, ________ speciation may occur when reproductive isolating mechanisms develop between two populations
A) allopatric B) extrinsic C) sympatric D) ecological
Answer: C
You might also like to view...
What is the single unique characteristic that distinguishes extant birds from other extant vertebrates?
A) endothermy B) feathers C) an amniotic egg D) flight E) a four-chambered heart
Of the following mammals, you would expect the _____ to have hemoglobin with the lowest affinity for oxygen.
A. mouse B. wolf C. human D. horse E. elephant
It is important for cattle to add proteins to their body, so which plant would be best for them to eat?
A) alfalfa B) oats C) corn D) barley
When a neurotransmitter released from one neuron binds to a ________ on a second neuron, that neuron depolarizes and fires.
A. enzyme-linked receptor B. ligand-gated ion channel C. voltage-gated ion channel D. nuclear receptor E. G-protein coupled receptor