Ch.38 Bio 102

Front 1

The primary goal of conservation biology is to

Back 1

counter the loss of biodiversity.

Front 2

Biodiversity considers

Back 2

the genetic diversity within and between populations of a species.

Front 3

Currently, the single greatest threat to biodiversity is

Back 3

habitat destruction due to humans.

Front 4

The three greatest current threats to biodiversity, in order starting with the greatest, are

Back 4

habitat loss, invasive species, and overharvesting.

Front 5

Which of the following is an invasive species?

Back 5

brown tree snake in Guam

Front 6

Global warming is the result of

Back 6

rising concentration of greenhouse gases.

Front 7

Greenhouse gases include

Back 7

carbon dioxide and methane.

Front 8

Scientists worry that global warming will result in the oceans

Back 8

becoming more acidic.

Front 9

Which of the following is not an observed effect of global warming on organisms?

Back 9

Some species of birds and frogs now begin their breeding seasons later in the year.

Front 10

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

Back 10

biological magnification.

Front 11

The current rate of extinction may be as much as ________ times higher than at any other time in the past 100,000 years.

Back 11

1,000

Front 12

Approximately ________ living species have been named and described.

Back 12

1.8 million