Tigers living in warm climates have thinner coats of fur than tigers living in cool climates. This is a result of

The easiest component of biodiversity to measure is

Which is the most direct way in which biodiversity can provide a source of income?

If current trends continue, the modern geologic era, known as the Quaternary period, may see the extinction of

The Sikhote-Alin Mountains, and the Siberian tigers living on them, are separated from other mountain regions in which the tigers could live. The mountains are an example of a(n)

The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and the Convention on Biological Diversity are examples of

To manage, protect, and reintroduce threatened and endangered species are the goals of

Which of the following is an example of a method for managing whole ecosystems and habitats?

Relieving a nation from repaying some of the money it owes other nations in exchange for protecting its biodiversity is called a

A region that includes tigers, eagles, lizards, fish, rabbits, and many other types of organisms would be described as having a high level of

Which is the highest level of biodiversity?

The latitudinal gradient is a natural pattern in which species diversity generally

Which type of organism dwarfs all others in terms of species diversity?

High levels of biodiversity tend to

Which product is often derived from the natural environment?

The disappearance of a particular population from a given area, but not of the entire species globally, is called

A species that is at serious risk of extinction is called a(n)

By far, the biggest cause of biodiversity loss today is

What global phenomenon has caused some organisms to move toward the poles or to higher altitudes?

In the United States, what is the major law that protects biodiversity?

A treaty is a(n)

One way that zoos and aquariums help increase wildlife populations is through

Which of the following represents single-species approaches to protecting biodiversity?

There is a plan to establish an 8000-kilometer-long strip of land across eight southeast Asian countries to rejoin fragments of tiger habitat. This is an example of a

Taxonomists are the scientists who classify species.

Species richness generally increases toward the poles.

An ecosystem is considered stable if it is both resistant and resilient.

At the international level, the United Nations has facilitated several treaties to promote biodiversity.

Most scientists agree that cloning provides much help to prevent biodiversity loss.

Populations with more genetic diversity are less able to cope with environmental change.

Species are evenly distributed among taxonomic groups.

In recent decades, extinction rates have been significantly lower than normal.

Due in part to the Endangered Species Act, roughly 40 percent of once-declining populations in the United States are now stable.

Clone breeding is the process of breeding and raising organisms in controlled conditions.

The sum total of all organisms in an area, taking into account the variety of species, their genes, their populations, and their communities, is called ____________________.

The differences in DNA among individuals within species and populations is called

Archaeological evidence shows that in case after case, a wave of ____________________ followed whenever humans arrived on islands and continents.

When nations ratify a ____________________, they promise to uphold the laws that are described.

The process of raising organisms in controlled conditions, such as zoos and botanical gardens, is called ____________________.

____________________ is the number or variety of species in the world or in a particular region.

A scientific study counted more ant species near the equator than near the North Pole, which demonstrates a natural pattern called the ____________________.

Based on current data about species population trends, some scientists claim we are in the middle of Earth’s sixth ____________________.

A species is ____________________ to an area if it is found nowhere else in the world.

A ____________________ is an area that supports an especially high number of endemic species, but is rapidly losing biodiversity.