Exam 3: Evolution, Biodiversity, and Population Ecology

A type I survivorship curve, with higher death rates at older ages, is typical of _____________

A coyote can alter its diet to match seasonal abundance of plants, fruits, or small animals, and would therefore be considered _____________

Extinction is _____________

Specific environment in which an organism lives

Read the following scenario and answer the question below. In 1906, President Theodore Roosevelt created the Grand Canyon National Game Preserve on the Kaibab Plateau in northern Arizona. Between 1907 and 1923, cattle grazing was greatly reduced, mule deer hunting was eliminated, and predators were killed. Over 800 cougars, 20 wolves (most had already been killed in the 1800s), and 7000 coyotes were trapped or shot. In response, the mule deer herd began to increase: By 1915, deer numbers were estimated at 25,000; 50,000 by 1920; and 100,000 by 1923. -Which of the following describes a graph of the Kaibab deer population between 1900 and 1923?

An S- shaped population growth curve best describes _____________

Which of the following are the major factors that determine a population's growth rate?

When populations approach their carrying capacity, their resources _____________

Number of individuals within a population per unit area

Populations in which the probability of dying is constant at every age exemplify _____________

Endemic species _____________

A species of bird had an original range covering the entire eastern half of the United States from New England down to Florida, west to the Rocky Mountains. During a period of glaciation, the eastern part of the range was cut off from the western part for 2000 years. Then the glaciers melted and the birds' original range was reestablished. During the separation, the western birds evolved a slightly different song and a darker wing color. Ornithologists are now studying this species to determine whether speciation has taken place. What evidence will they look for in their study?

Which of the following would be most vulnerable to extinction?

Population distribution describes _____________

The functional role of a species in its community is its _____________

A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following will be true of this species' response to natural selection?

Describe the sixth mass extinction event, and its specific causes.

Read the following scenario and answer the question below. In 1906, President Theodore Roosevelt created the Grand Canyon National Game Preserve on the Kaibab Plateau in northern Arizona. Between 1907 and 1923, cattle grazing was greatly reduced, mule deer hunting was eliminated, and predators were killed. Over 800 cougars, 20 wolves (most had already been killed in the 1800s), and 7000 coyotes were trapped or shot. In response, the mule deer herd began to increase: By 1915, deer numbers were estimated at 25,000; 50,000 by 1920; and 100,000 by 1923. -The removal of the livestock and predators, and the cessation of hunting in 1907 _____________

An example of a density- independent factor would be _____________

Species occurring in only one area