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Ecosystems Test Review Fall 2014 (Part 2 Of 3)
Test Description: Life Science DE Ecosystems Review
Instructions: Answer all questions to get your test result.
1) 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 outcompetes native organisms for food and space.
C
The species fills a niche that had not previously been filled.
D
The species disrupts the balance of a food web.
2) 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
keystone species
B
secondary species
C
exotic species
D
pioneer species
3) How do abiotic factors and biotic factors differ?
A
Abiotic factors do not affect biotic factors.
B
Biotic factors are living, and abiotic factors are nonliving.
C
Only biotic factors are part of an ecosystem.
D
Abiotic factors in an ecosystem never change.
4) 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
New land has been formed.
B
The forest has been covered by a new substrate.
C
Plants and animals previously lived in the forest.
D
The land had never previously been occupied.
5) 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.
6) How do consumers always obtain energy?
A
by capturing radiation from the sun
B
by eating plants
C
by absorbing detritus
D
by eating organisms
7) In what scenario would an exotic species be a benefit to an ecosystem?
A
The exotic species destroys valuable habitat.
B
The exotic species outcompetes the other species for food.
C
The exotic species preys on a damaging pest.
D
The exotic species introduces disease into the ecosystem.
8) Which of the following would be included in an ecosystem but not a community?
A
green algae
B
river rocks
C
willow tree
D
mallard duck
9) A particular area contains snakes, lizards, hawks, and squirrels. Together these animals make up the the area's
A
habitat
B
population
C
community
D
ecosystem
10) Why is it so important to avoid pollution of freshwater ecosystems?
A
Freshwater ecosystems are the source of most of our drinking water.
B
Freshwater organisms are more important than marine organisms are.
C
Freshwater ecosystems contain more species than marine ecosystems contain.
D
There are more freshwater ecosystems than there are marine ecosystems.
11) What is the correct order of a food chain containing the following organisms: quail, desert shrub, coyote, snake?
A
desert shrub → snake → quail → coyote
B
quail → desert shrub → snake → coyote
C
coyote → snake → quail → desert shrub
D
desert shrub → quail → snake → coyote
12) All tertiary consumers eat
A
marine animals
B
animals
C
large animals
D
plants
13) 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
14) What type of species interaction directly benefits both species involved?
A
commensalism
B
symbiosis
C
parasitism
D
mutualism
15) What level of biological organization is being represented by distribution patterns?
A
Cell
B
Biosphere
C
Population
D
Community
16) What type of species interaction benefits one species without affecting the other species?
A
mutualism
B
parasitism
C
predation
D
commensalism
17) Which of the following is the best example of primary succession?
A
Ecologists plant new pine trees in a forest that had been destroyed by fire.
B
A pond refills with water after a drought, and mussels repopulate the pond.
C
After a toxic spill is cleaned up, plants and animals return to the area.
D
A bird drops a plant seed on an uninhabited island, and a new plant species grows.
18) From what sources do all secondary consumers obtain at least some of their energy?
A
producers and primary consumers
B
producers and all other consumers
C
producers
D
primary consumers
19) Which of the following is NOT a resource for which organisms in a rainforest ecosystem compete?
A
space
B
oxygen
C
sunlight
D
water
20) Common decomposers include
A
bacteria and fungi
B
algae and bacteria
C
fungi and plants
D
algae and plants
*select an answer for all questions
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