Biodiversity Threats to Biodiversity Conserving Biodiversity Human Impacts Actual Test Questions

When the last member of the species dies

Extinction

Thee number of different species in a biological community

Species diversity

Maintaining ______ has a direct economic value to humans

Biodiversity.

Why is it important to maintain biodiversity for medical reasons?

Humans rely on plants for medicine

The process of transferring genes is known as

Genetic Engineering

An event in which a large amount of all living species become extinct in a relatively short time

Mass extinction

All the materials and organisms found in the biosphere

Natural resources

The excessive use of species that have economic value is known as

Overexploitation

The gradual process of species becoming extinct is known as

Background extinction

Occurs when fertilizers, animal waste, sewage, or other substances rich in phosphorus flow in waterways causing extensive algae growth

Eutrophication

Resources that are replaced faster than they are consumed are known as

Renewable resources

Using resources at a rate at which they can be replaced or recycled is known as

Sustainable use

Species that are found only in specific geographic area

Endemic species

The use of living organisms such as prokaryotes, fungi, or plants to detoxify a polluted are is known as

Bioremediation

Adding natural predators to a degraded ecosystem is known as

Biological augmentation

Throughout history, humans have lived primarily as what types of groups?

Hunters/gatherers

What layer of the atmosphere contains the ozone layer

Stratosphere

What specific atom is the main cause of the greenhouse effect

CO2

The two different sources of water pollution are known as

Point and Non-point

The accumulation of chemicals in organisms at higher trophic levels of a food chain is known as what

Biomagnification

True or false: the best way to restore a damaged ecosystem is to introduce predators to control the population of endemic species

False

The cheetah population was around 100,000 in Today, fewer than 12,000 cheetahs remain. What type of natural recources are cheetahs considered?

Nonrenewable

The variety of ecosystems that are present in the biosphere is called

Ecosystem Diversity

The different environmental conditions that occur along the boundaries of an ecosystem are described by ecologists as ________

Edge Effects

Why is sandstone classified as a nonrenewable resource

Sandstone takes thousands of years to form