chapter one exam Flashcards
part three
Which human activity(ies) could cause an increase in extinction rates?
habitat destruction, pollution, and anthropogenic climate change
Endangered species are:
at risk of becoming extinct.
When a non-native mammal like a mongoose established itself in Guam, it became an:
invasive species.
What is NOT an example of an ecosystem service?
a. fuel made from forest materials
b. water purification
c. decomposition of organic material
Incorrect Response
d. camping
All of these choices are examples of ecosystem services.
happens when there is a decrease in the frequency of a particular trait due to random mating.
Genetic drift
A genetic trait causes double muscling in cattle. Breeders mate individuals with this trait to increase muscle mass in their herd. This is an example of:
artificial selection.
Which factor is NOT an environmental cost of clearing tropical forests?
.increased biodiversity
Deforestation is a form of habitat fragmentation because it:
produces islands where before there were large expanses of land.
Biodiversity is important in a population because:
.it allows the population to be more resistant to disruptions.
You see a bee pollinating a flower. This is an example of which ecosystem service?
.ecosystem regulation and support services
The number-one threat to biodiversity is:
habitat destruction.
Biodiversity at the population level is known as _____ diversity.
genetic
Different versions of genes in a population are called:
alleles.
Green and blue coral snakes are found in even numbers on a small isolated Pacific island. A hurricane hits the island and randomly kills the majority of the blue coral snakes. The remaining coral snakes repopulate the island, with green now being the predominant color. With regard to evolution, this change is considered an excellent example of:
the bottleneck effect.
What is NOT a cause of habitat destruction?
reforestation
