UNIT 10 EXAM REVIEW

Which of the following is not a key component of biodiversity?

• species diversity

• genetic diversity

• climate diversity

• ecological diversity

The variety of ecosystems in a region is referred to as:

• biodiversity

• genetic diversity

• species diversity

• ecological diversity

What is the importance of a pioneer species in primary succession?

• Pioneer species establish themselves and are able to create soil.

• Pioneer species help grow trees.

• Pioneer species migrating to an area shows that all steps of succession have taken place.

• Pioneer species have no true importance in succession.

What is the climax community in ecological succession?

• a community that only exists for a little while

• the community that experiences the most disturbance

• the first community that was established with pioneer species

• a stable community that shows the end of succession

Which of the following is an example of secondary succession?

• grass growing on sand dunes

• a forest regrowing after a logging operation cut the trees down

• lichens growing on bare rock

• moss growing on a new lava flow

What happens when an ecosystem exceeds its carrying capacity?

• The population will continue to grow.

• Some individuals will die or migrate to another location.

• The ecosystem will expand to accommodate more individuals.

• Resources will become more abundant to support the growing population.

What factor is most responsible for limiting the number of giraffes in a savanna ecosystem?

• the amount of rainfall

• the temperature of the environment

• the presence of other herbivores like zebras

• the number of trees with leaves at a height only giraffes can reach

What effect does ocean acidification have on some ocean organisms?

• Carbonic acid harms the shells and skeletons of certains organisms.

• CO2 makes the water too acidic to drink.

• Corals and other organisms flourish under acidic conditions.

• Whales and dolphins will speak less, decreasing ability to hunt food.

Which answer below is most likely to cause a dead zone due to runoff?

• dirt

• plastic

• fertilizer

• salt

A marine biologist studying seabird populations notices that the number of hatchlings declines after an oil tanker spill occurs off the coast where one of the birds' major nesting sites is located. Which of the following is the probable human impact on the birds' nesting site?

• fertilizer runoff

• plastic pollution

• ocean acidification

• deep sea drilling contamination