Question

read the following selection and answer the questions that follow
in 1906, president theodore roosevelt established the grand canyon national game preserve on the kaibab plateau in northern arizona. the preserve was created to protect deer from hunting and predation, which had reduced the population of kaibab deer to only about 4000. hunters were prohibited from shooting deer, but they were allowed to shoot the deers predators, including coyotes and cougars. between 1907 and 1923, over 600 cougars and 3000 coyotes were trapped or killed. in response, the deer herd began to increase. by 1923, the deer were estimated at 20,000; by 1924, at 50,000; and by 1925, at approximately 100,000.
if you were to graph the population growth of the kaibab deer from 1906 and 1923, what would you see?

• an up - and - down, wavelike pattern
• a straight line, showing a steady increase over time
• a j - shaped upward curve showing very rapid increase
• an s - shaped curve that shows smooth, rapid increase leveling off in 1923

a populations growth rate is determined by birth, death,
immigration, emigration
migration, immigration
biotic potential, carrying capacity
emigration, migration

Explanation:

For question 14:

• From 1906 - 1907, the deer population was about 4000.
• By 1923, it was approximately 100,000.
• The growth was rapid and then leveled off (as the text doesn't mention continuous unrestricted growth after 1923). An S - shaped curve (logistic growth curve) shows initial slow growth, then rapid growth, and then leveling off as carrying capacity is approached.

For question 15:

• Population growth rate formula is \(r=(B + I)-(D+E)\) where \(B\) = births, \(D\) = deaths, \(I\) = immigration, \(E\) = emigration.

Answer:

1. an S - shaped curve that shows smooth, rapid increase leveling off in 1923
2. Immigration, Emigration