NREM 120 Final Exam 1 | Questions And Answers Latest {2024- 2025} A+ Graded | 100%
Verified
Extinction - disappearance of a species. Caused by natural and human forces-90% of species have now
vanished
Alien Species - species that have been accidentally or intentionally introduced. May kill native species,
out-compete it, or the alien species may not survive.
Habitat Destruction - one of the causes of extinction, logging, urban planning, etc.
Ecological Islands - tiny patch of natural habitat. Scattered among crops, pastures, towns, housing
developments
Habitat Fragmentation - destruction of habitat that results in the formation of ecological islands
Specialists - organism that has narrow requirements for reproduction and survival. They are very
vulnerable to extinction. Cannot adapt easily.
Generalists - Organisms that occupy a variety of habitats and eat of number of different foods. They
adapt well and are not very vulnerable to extinction
Methods for preventing extinction - zoo-botanical garden approach, species approach, ecosystem
approach
Zoo-botanical garden approach - They take an animal that is close to extinction and put it in a zoo and
get it to procreate. Then when the population is higher they release them back into the wild. This is a
last ditch effort.
Species Approach - focus on a species that is not yet critical and study their niche system. They then
design programs to expand the resources that they need to survive. Tends to overlook other species.
Verified
Extinction - disappearance of a species. Caused by natural and human forces-90% of species have now
vanished
Alien Species - species that have been accidentally or intentionally introduced. May kill native species,
out-compete it, or the alien species may not survive.
Habitat Destruction - one of the causes of extinction, logging, urban planning, etc.
Ecological Islands - tiny patch of natural habitat. Scattered among crops, pastures, towns, housing
developments
Habitat Fragmentation - destruction of habitat that results in the formation of ecological islands
Specialists - organism that has narrow requirements for reproduction and survival. They are very
vulnerable to extinction. Cannot adapt easily.
Generalists - Organisms that occupy a variety of habitats and eat of number of different foods. They
adapt well and are not very vulnerable to extinction
Methods for preventing extinction - zoo-botanical garden approach, species approach, ecosystem
approach
Zoo-botanical garden approach - They take an animal that is close to extinction and put it in a zoo and
get it to procreate. Then when the population is higher they release them back into the wild. This is a
last ditch effort.
Species Approach - focus on a species that is not yet critical and study their niche system. They then
design programs to expand the resources that they need to survive. Tends to overlook other species.
