Exam 38: Conservation Biology

You are a climate scientist who wants to investigate climate change. Which of the following measurements would be the least useful?

According to this graph of changes in Earth's atmosphere, which of the following took place between the years 1800 and 2000?

The ability to change phenotype in response to local environmental conditions is called

Small areas that are home to a large number of threatened species and an exceptional concentration of species found nowhere else on Earth are called

Biodiversity considers

After reading the paragraph below, answer the question that follows. Rice is a staple crop across Asia; it serves as a main nutritional source for Asia's high population. In the 1970s, a pathogen called the grassy-stunt virus greatly decreased cultivated rice plant populations. Scientists found one wild relative of the rice plant in India that was resistant to the grassy-stunt virus, and today hybrid rice plants with that resistant gene are grown across Asia. To find this one rice plant species, approximately 17,000 rice plants samples were tested over the course of four years. -If you were a scientist working on this project, how would you argue that the results of the research would be worth the time investment?

After reading the paragraphs below, answer the questions that follow. Introduced species are a problem all over the world, and there are many examples in the United States. Several years ago, a fisherman caught a northern snakehead fish in a pond in Crofton, Maryland (a suburb of Washington, DC). Snakeheads are a favorite food of immigrants from China, and live fish can frequently be found in Asian markets. It was suspected that the fish in the Crofton pond were purchased locally and then intentionally released. Snakeheads are top predators, and 90% of the northern snakeheads' diet consists of other fishes. The northern snakehead can breathe out of water and travel short distances (about 100 feet) across land. They also breed rapidly. Females can lay more than 100,000 eggs per year. Juveniles have also been identified in the Potomac River and other rivers in Pennsylvania. -When snakeheads enter aquatic ecosystems, biodiversity in these ecosystems would most likely

Araschnia levana is a species of butterfly that breeds several times a year. It has two distinctly colored pupae: Those that emerge in spring are orange and those that emerge in summer are brown. The seasonal color variations in pupae mean that the pupae blend into the colors in their environment. This is an example of

You spray your lawn with a pesticide. The concentration of the pesticide in the tissues of the grass on your lawn is 10⁻⁶ parts per million (ppm). Grasshoppers eat the grass and are in turn eaten by rats, which are then eaten by owls. At each successive trophic level, the concentration of pesticides increases. The term for this process is

The figure below depicts natural fluctuation of ozone levels in Switzerland between 1925 and 1976. Dobson units are a way to measure the total amount of atmospheric ozone above a point on the Earth's surface. What can you conclude from this figure?

The primary goal of conservation biology is to

Habitats with many edges

Movement corridors

About one-third of all animal and plant species are concentrated on ________ of Earth's land.

A regional assemblage of interacting ecosystems is a

The Kissimmee River Restoration Project is intended to

Which of the following is not an example of a predicted impact of climate change?