A population of mountain goats are split because of the formation of a glacier. After 500 years the glacier melts and the two goat populations are free to move between the two areas. Under what conditions might a hybrid zone occur?
A. Both pre-¬ and post-¬zygotic isolating mechanisms have arisen.
B. Reproductive isolation is incomplete.
C. Pre-¬zygotic isolating mechanisms have arisen.
D. Post-¬zygotic isolating mechanisms have arisen.
E. Gene flow between the two populations does not occur.
B. Reproductive isolation is incomplete.
You might also like to view...
A certain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western United States. To understand why this tree grows only in these specific places, an ecologist should _____
A) conclude that lower elevations are limiting to the survival of this species B) study the anatomy and physiology of this species C) investigate the various biotic and abiotic factors that are unique to high altitude D) analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth E) collect data on temperature, wind, and precipitation at several of these locations for a year
Which muscles contract during a restful expiration?
(a) external intercostals. (b) diaphragm. (c) abdominal. (d) both b and c.
How did Kenneth Lohmann study the navigation ability of young loggerhead sea turtles?
a. He placed radio transmitters on the shells of numerous hatchlings and tracked their migration patterns in the Atlantic ocean. b. He genetically engineered turtles so they lacked magnetoreceptors and then studied their behavior compared to a control group. c. He subjected turtles to an electromagnetic field opposite that of Earth's magnetic field, and then tracked the direction the hatchlings swam. d. The loggerhead turtles were injected with magnetite to see what impact it had on their navigation. e. Small magnets were glued to the hatchlings' shells, and their behaviors were monitored.
How does a person distinguish flavors? What will be an ideal response?