Download Ecology Test *Use Answer sheet TEST A Test Number: Chapter 3, 4

Ecology Test *Use Answer sheet
Chapter 3, 4, 5 and 6
TEST A
Test Number:
1. The branch of biology dealing with interactions among organisms and between organism and their environment is
a. economy
b. modeling
c. recycling
d. ecology
2. Which of the following descriptions about the organization of an ecosystem is correct?
a. communities make up species, which make up populations
b. populations make up species, which make up communities
c. species make up communities, which make up populations
d. species make up populations, which make up communities
3. Only 10% of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy,
some is used for the organisms life processes, and the rest is
a. used in reproduction
c. stored as fat
b. stored as body tissue
d. eliminated as heat
4. The event that can occur after a lake receives a large input of nitrogen from fertilizers is
a. an algal bloom
c. nitrogen compounds are recycled
b. algae begin to die and decomposers take over
d. the concentration of oxygen drops below
5. Each of the following is an abiotic factor in the environment EXCEPT
a. plant life
b. rainfall
c. soil type
6. A symbiosis in which both species benefit is
a. commensalism
b. mutualism
c. predation
d. temperature
d. parasites
7. The symbiotic relationship between a flower and the insect that feeds on its nectar (providing pollination and growth
for the flower) is an example of
a. mutualism because the flower provides the insect with food, and the insect pollinates the flower
b. parasitism because the insect lives off the nectar from the flower
c. commensalism because the insect does not harm the flower and the flower does not benefit
d. predation because the insect feeds on the flower.
8. Primary succession can begin after
a. algae bloom
b. farm land Is abandoned
c. a lava flow
d. a thunderstorm
9. What is the difference between primary and secondary succession?
a. primary succession is slow and secondary succession is rapid
b. secondary succession begins on soil and primary succession begins on newly exposed surfaces
c. Primary succession modifies the environment and secondary succession does not
d. Secondary succession begins with lichens and primary succession begins with trees
10. A small farming community in Texas covers 14 square kilometers. There are 420 individuals who live within the town
limits. What is the population density of the community?
a. 0.03 individuals per square kilometer
c. 53 individuals per square kilometer
b. 30 individuals per square kilometer
d. 10.24 individuals per square kilometer
420/14 = 30 per square kilometer
11. Which of the following tells you population density?
a. the number of births per year
c. the number of deaths per year
b. the number of frogs
d. the number of bacteria per square millimeter
12. Which are the two ways population can decrease in size?
a. immigration and emigration
c. decreased birthrate and emigration
b. increased death rate and immigration
d. emigration and increased birthrate
13. The population of brown trout in the Missouri River is estimated using mark and recapture method. The fish
biologist originally marked 30 trout and released them. Over a month long period the biologist caught and released 150
brown trout. 15 of these had tags. Use the mark and recapture equation to determine the estimated population of
brown trout. Population estimate =(total number captured) X (number originally marked)
Total number Captured with Mark
a. 55
b. 200
c. 4500
d. 300
14. A relationship in which one organism is helped and another is neither helped nor hurt is called
a. parasitism
b. mutualism
c. competition
d. commensalism
15. The relationship between a tick and its host is an example of
a. mutualism
b. parasitism
c. competition
d. commensalism
Use the following graph to answer questions 16-19
16. Which graph shows exponential growth?
a. graph 1
b. graph 2
c. line A
d. both are logistic growth
17. Which graph shows logistic growth?
a. graph 1
b. graph 2
c. line A
d. both are exponential
18. Line A represents the maximum number of organisms of a particular species that can be supported by an
environment and is called the
a. logistic growth
b. carrying capacity
c. exponential growth d. succession
19. In the presence of unlimited resources and in the absence of disease and predation, what graph would represent
bacterial growth?
a. graph 1
b. graph 2
c. graph 3
d. line A
20. Limiting factors that depend on population size are called
a. density- dependent limiting factor
b. density-independent limiting factor
c. predator-prey relationship
d. primary succession
21. Example(s) of density-independent limiting factors include
a. hurricane
b. disease
c. parasitism
d. competition
22. As needed resources in a population become less available, population growth will
a. decline rapidly
c. enter exponential growth
b. go through succession
d. reach carrying capacity
Use the graph below to answer the next few questions about populations. 23-25
23. What is the approximate population of moose (dotted line) in 1960?
a. 300
b. 15
c. 250
d. 500
24. What is the approximate population of wolves (plain line) in 1980?
a. 0
b. 750
c. 100
d. 50
25. What is the probable cause of the sharp decline in wolves in 1981?
a. Wolves starved because of the drop in the moose population.
b. Moose started hunting the wolves.
c. Wolves spread a disease quickly because of overpopulation and density.
d. Wolves starved due to a cold winter.
26. If a deer consumes 500 kg of primary producer (grass, trees, etc). How much of this is incorporated into the
biomass of the deer?
a. 5
b. 50
c. 500
d. 100%
ill in the blanks for 27-34 using image 1 and image 2 food webs.
1)Use the following designations for trophic level: - primary producers (PP) primary consumers (PC), secondary
consumers (SC), and tertiary consumers (TC).
2)Type of consumer: (O), Carnivore (C), Herbivore (H), Detritivore (D), Decomposer (DE)and Scavenger (S).
Photosynthesis (P)
3) Indicate autotroph (A) and heterotroph (H) for each level.
Image 1
Image 2
27. Plantain-PP, P and autotroph
28. Mushroom PC, DE and heterotroph
29. Fox -SC, C, H
30. Ladybug – SC, C, H
31. Bear- PC, SC, O, H
32.seeds –PP, P, A
33. Deer – PC, H, H
34. Marmot – PC- H, H