A species that influences the survival of many other species in an ecosystem.
100
Species that could become endangered in the near future are called this.
Threatened species
100
What is the disappearance from Earth of all members of a species?
Extinction
100
What is the major cause of extinction?
Habitat distruction
100
A town's decision about how to dispose of its trash is a decision made at a
a. personal level
b. local level
c. national level
d. global level
b. local level
200
Decisions about how to protect Earth's atmosphere are made on a
a. local level
b. personal level
c. global level
d. national level
c. global level
200
Which of the following is not a factor that affects biodiversity?
a. diversity of niches
b. climate
c. land area
d. cancer-fighting drugs
d. cancer-fighting drugs
200
What makes a species more able to resist diseases and parasites?
Genetic Diversity
200
What is the most diverse ecosystem in the world?
Tropical rain forests
200
Name three ways that biodiversity can be protected.
Captive Breeding
Laws and Treaties
Habitat Preservation
300
Name four human activities that can threaten biodiversity.
Habitat destruction, poaching, pollution, and introducing exotic species
300
What happens to an ecosystem's diversity when habitats are fragmented?
The biodiversity will decrease because there is not enough space for nesting and food.
More animals would be killed by predators because they are no longer protected by the trees. They could also be killed by crossing the road.
300
What is captive breeding?
The mating of animals in zoos or wildlife preserves.
300
What are some things that pollution can be caused by?
Chemicals, wastes, noise, burning oils/gasoline
300
The ability of a plant species to fight disease is a result of what?
gene pool diversity
400
What is a natural resource?
Anything in the environment that is used by people.
400
Any change to the environment that has a negative effect on living things is called?
Pollution
400
How does taxol affect cancer cells?
It forms tiny "cages" around the cancer cell preventing it from dividing. The cancer does not grow or spread.
400
What are the resources that are not replaced as they are used called?
non-renewable resources
400
The number of different species in an area is called this.
Biodiversity
500
What are the structures in an organism's cells that carry its hereditary information.
Genes
500
What is habitat fragmentation?
Where habitats are broken into smaller, isolated pieces.
500
Which of the following questions does not represent an environmental issue?
a. Should Antarctica's natural resources be developed?
b. What was the size of Earth's human population in A.D. 1650?
c. Should a town build an incinerator to replace its landfill?
d. Should unlimited harvesting of lobsters be legal?
b. What was the size of Earth's human population in A.D. 1650?
500
Why are rain forest plants sources of medicines?
Because they produce chemicals that protect them from predators, parasites, and disease.
500
What is poaching?
The illegal killing or removal of wildlife species.