During Hurricane Marilyn, 15 green iguanas were blown out to sea from the island of Guadalupe. They floated on mats of vegetation for several weeks until they landed on the island of Anguilla. If these green iguanas evolve reproductive barriers and become a new species, this would be an example of:
A) allopatric speciation
B) sympatric speciation
C) postzygotic barrier
D) a miracle
E) none of the above
Ans: A) allopatric speciation
You might also like to view...
Which immunoglobulin class/es can fix complement?
A. IgG only B. IgE and IgA C. IgD only D. IgM and IgG E. IgM only
During a particular period of physiological crisis, imagine that your carbon dioxide levels increase sharply, and consequently your blood pH decreases. Predict what will happen to the affinity of your hemoglobin for oxygen in this situation.
A. The affinity for oxygen by hemoglobin will increase. B. The affinity for oxygen by hemoglobin is constant-it does not change. C. The affinity for oxygen by hemoglobin will decrease.
Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. Can a man with normal color vision father a daughter who is red-green color-blind?
A) Yes, if the woman with whom he mates is red-green color-blind. B) Yes, if the man is heterozygous for red-green color blindness. C) No, he can't (unless there is a mutation). D) No, the expression of the trait skips a generation.
Birds are able to sustain long flights at high altitudes because they
A) can extract oxygen during both inhalation and exhalation. B) decrease their heart rate during flight. C) use anaerobic metabolism during flight. D) have thicker blood than other animals, with many more red blood cells. E) are able to lower their body temperature during flight.