Biology Study Guide 4

Refer to the illustration above. During which time period are the birth and death rate equal?

Refer to the illustration above. The rate of growth of a population is represented by r. The time period during which r would have a negative value is

The movement into a population is known as:

The graph above shows the birth rate and death rate for a population during the 1900s. From 1900 to 2000, the population has:

The graph demonstrates changes in the populations of lynx and snowshoe hares. Which statement BEST describes what the graph shows about the populations of lynx and snowshoe hares?

Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?

The news often talks about how global warming could change environmental conditions on Earth. Which BEST explains why global warming is such a concern?

In 1598, explorers discovered the dodo bird on an island in the Indian Ocean. The bird was overhunted, and it became extinct by 1681. Soon after the dodo became extinct, the calvaria tree, found on the same island, stopped reproducing. Which statement describes the relationship that MOST likely existed between the dodo and the calvaria tree?

The zebra mussel is a freshwater organism from Europe. However, some were accidentally brought into the Great Lakes by shipping vessels. Which statement best explains how these mussels could threaten the ecosystems in the Great Lakes?

In a forest ecosystem, spotted owls make their homes in the cavities of dead trees. This same habitat is home to the mice that the owls feed on. Human activities, such as logging, have caused the population of the spotted owl to decline. From this information, what statement BEST explains the relationship between humans and the spotted owl?