Unit 7 Review

Biodiversity, aka biological diversity, usually refers to

• the same species in a general location

• the number of different species in a given area

• the number of animal species in a given area

• the number of plant species in a given area

High biodiversity is

• having a lot of the same organism.

• having a few of the same organism.

• having a lot of variety of different organisms.

• only having one of each organism.

Which of the following would be most effective in slowing the loss of biodiversity?

• creating large parks/preserves in biodiversity hotspots

• requiring every country to maintain a seed bank

An endangered species is

• One whose numbers are so small that it is at risk of extinction

• One whose not been spotted after many years.

• One whose numbers are abundant.

What are the greatest problems facing plants, animals, and people?

• habitat destruction

• illegal hunting

• introducing new species that can cause problems

• all of the above

Humans are causing extiction in which ways?

• By over hunting animals for food or products.
• By destroying the natural habitat of species.
• By polluting the environments of the world.
• All of the above.

The largest number of individuals that an environment can support long term is...

• carrying capacity

• emigration

• immigration

• population density

What happens if a population grows past its carrying capacity?

• The population keeps growing

• The population starts to die off

• The entire species will go extinct

• The carrying capacity just increases

Things that limit how large a population can grow is called

• Force factors

• Limiting factors

• Nonbiotic factors

• Need factors

Biotic can be defined as

• the living parts of an environment

• non-living parts of an environment

• rocks and water

• snakes and water