Ecosystems Test Review Fall 2014 (Part 2 Of 3): Question Preview (ID: 20920)

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What type of species interaction benefits one species without affecting the other species?
a) predation
b) parasitism
c) commensalism
d) mutualism

Which of the following is the best example of primary succession?
a) A bird drops a plant seed on an uninhabited island, and a new plant species grows.
b) Ecologists plant new pine trees in a forest that had been destroyed by fire.
c) A pond refills with water after a drought, and mussels repopulate the pond.
d) After a toxic spill is cleaned up, plants and animals return to the area.

What level of biological organization is being represented by distribution patterns?
a) Cell
b) Biosphere
c) Community
d) Population

All tertiary consumers eat
a) animals
b) large animals
c) marine animals
d) plants

In a predator-prey relationship, which organism(s) benefit?
a) the prey
b) the predator
c) both the predator and the prey
d) neither the predator nor the prey

What type of species interaction directly benefits both species involved?
a) mutualism
b) commensalism
c) parasitism
d) symbiosis

What is the correct order of a food chain containing the following organisms: quail, desert shrub, coyote, snake?
a) coyote → snake → quail → desert shrub
b) desert shrub → snake → quail → coyote
c) quail → desert shrub → snake → coyote
d) desert shrub → quail → snake → coyote

Why is it so important to avoid pollution of freshwater ecosystems?
a) Freshwater ecosystems contain more species than marine ecosystems contain.
b) Freshwater ecosystems are the source of most of our drinking water.
c) There are more freshwater ecosystems than there are marine ecosystems.
d) Freshwater organisms are more important than marine organisms are.

A particular area contains snakes, lizards, hawks, and squirrels. Together these animals make up the the area's
a) ecosystem
b) habitat
c) community
d) population

Which of the following would be included in an ecosystem but not a community?
a) mallard duck
b) river rocks
c) green algae
d) willow tree

In what scenario would an exotic species be a benefit to an ecosystem?
a) The exotic species preys on a damaging pest.
b) The exotic species introduces disease into the ecosystem.
c) The exotic species outcompetes the other species for food.
d) The exotic species destroys valuable habitat.

How do consumers always obtain energy?
a) by capturing radiation from the sun
b) by absorbing detritus
c) by eating plants
d) by eating organisms

What would most likely happen to the fish living in a freshwater pond if it became contaminated by salt water?
a) The fish would adapt over time to the salt water.
b) The fish would be re-classified as marine organisms.
c) The fish would die from the change in salinity.
d) The fish would thrive in the salt water.

A forest is heavily logged, but years later, plant and animal populations rebound. Why is this an example of secondary succession and not primary succession?
a) Plants and animals previously lived in the forest.
b) The land had never previously been occupied.
c) New land has been formed.
d) The forest has been covered by a new substrate.

How do abiotic factors and biotic factors differ?
a) Abiotic factors do not affect biotic factors.
b) Only biotic factors are part of an ecosystem.
c) Abiotic factors in an ecosystem never change.
d) Biotic factors are living, and abiotic factors are nonliving.

When sea otters disappear from a marine ecosystem, the population of sea urchins grows uncontrollably. In this case, the sea otters are an example of a(n)
a) exotic species
b) pioneer species
c) keystone species
d) secondary species

Which of the following is NOT an example of an exotic species negatively impacting the environment?
a) The species carries a disease that native organisms have never been exposed to.
b) The species fills a niche that had not previously been filled.
c) The species outcompetes native organisms for food and space.
d) The species disrupts the balance of a food web.

From what sources do all secondary consumers obtain at least some of their energy?
a) producers
b) primary consumers
c) producers and primary consumers
d) producers and all other consumers

Which of the following is NOT a resource for which organisms in a rainforest ecosystem compete?
a) water
b) space
c) sunlight
d) oxygen

Common decomposers include
a) fungi and plants
b) algae and plants
c) bacteria and fungi
d) algae and bacteria

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