Ecology unit review Chap 34

Chapter 34 Review Sheet
Defintions:
Identify the key terms from chapter 34 (these may or may not be in bold) . Organize terms by section. During the rest of this review sheet attempt to use these terms to answer the questions. DO NOT just write the terms and define them.

Diagrams:
Create the following diagrams: Be sure to label them appropriately, using the correct terms. Title (always) and axis needed if applicable.
1. Energy Flow and Chemical Cycling
2. Show where the 90% of the energy lost from the herbivores to carnivores goes.
3.Food chain for the atlantic ocean
4. Food web for a decidous forest. ( think your backyard, local park)
5.Draw all three ecological pyramids. Include an example of how a specific pyramid can look upside down.
6.General model for chemical cycling
7. Water cycle
8. Phosphorus cycle
9.Nitrogen Cycle
10. Carbon Cycle
11. Oxygen cycle
For drawings 7-11 Identify, on the diagram, what human activities influence the cycle and in what manner and what ecosystem component is involved (minimum 2). Ie carbon cycle: Burning of fossil fuels, Increases CO2 levels (reservoir). Replanting of large forest areas, Decreases CO2 in atmosphere(biotic community).

Multiple choice
Identify what section the question is from. Briefly identify the concept that the question based on. Identify the answer.

The ____ is made of a community of organisms plus its physical environment.

A. food chain
B. habitat
C. niche
D. ecosystem
E. trophic level
Which of the following is/are a biotic factor in an ecosystem?

A. the food chain
B. inorganic nutrients
C. water availability
D. temperature
E. All of the choices are biotic factors in an ecosystem.
How are omnivores, carnivores, and herbivores similar?

A. They are all producers.
B. They are all consumers.
C. They all produce their own food.

D. They all produce oxygen.
E. They are all consumers and produce carbon dioxide
The only heterotrophs required in an ecosystem are

A. omnivores.
B. herbivores.
C. decomposers.
D. autotrophs.
E. carnivores
Energy flow in an ecosystem is NOT cyclic because energy is

A. increased as you go up the energy pyramid.
B. evenly spread out over many organisms.

C. converted to many kinds of useful energy.
D. totally destroyed as it is used.

E. no longer useful when it is converted to heat.
Which of the following is NOT necessary to keep a balanced (stable) ecosystem going?

A. Matter (i.e., elements) has to cycle.
B. There must be an outside energy source.

C. Various populations of producers and consumers must be proportional.

D. Bacteria and fungi should be eliminated.
E. Energy must be allowed to flow through the ecosystem.
Pioneers move into an area and harvest most of the foxes for fur. They are likely to see

A. hawks die out.
B. squirrel populations increase.

C. grasshopper populations increase. D. hawk populations immediately increase.
Most natural food chains are only four or five links long. The number of trophic levels is limited because

A. there are more predators than herbivores.
B. winter kills off most insects and stops the food chains.

C. the efficiency in utilizing the food eaten at each level is very low.
D. All of the choices are correct.
A detritus food chain begins

A. in the ocean.
B. with a producer.
C. with decaying matter.
D. with air pollution.
E. with fungi.
What happens to the amount of energy while going up the food pyramid?

A. The amount of energy decreases.
B. The amount of energy increases.

C. The amount of energy stays the same.
D. The amount of energy first decreases and then finally increases.

If your bobcat is starving, you could give it a mouse (weighing an average of 100 grams) every other day, for a total of 180 mice per year. The pet store charges 50 cents per mouse. Or you could buy grass seed at $1 per kilogram (= 1,000 g) for the mice, and turn your yard into a mouse factory for the cat. What would keep the cost lowest?

A. Buy mice at 50 cents each.
B. Buy grass at $1 a kilogram.
C. Both break even.

D. Buy both mice and grass seed so that each makes up 50% of the cat's diet
Which of the following is NOT an air pollution concern?

A. photochemical smog
B. acid rain
C. thermal inversion
D. ozone shield depletion
E. eutrophication
Nitrogen fixation

A. can occur in root nodules of legumes.
B. can occur in aquatic systems or in soil bacteria.

C. may occur as ammonium is converted to nitrate.
D. may occur as nitrogen gas is converted to nitrate.

E. All of the choices are correct.
Which of the following is usually a limiting factor (nutrient) for plants in aquatic systems?

A. Nitrogen
B. Nitrites
C. Carbon dioxide
D. Phosphates
Which of the following is NOT involved in biological magnification in a food chain?

A. heavy metals
B. organochloride pesticides
C. carbon dioxide
D. PCBs
E. DDT

Answer Sheet should be organized as follows:
Name
Period

Chapter 34 Review Sheet
Definitions
Term
Section



Drawings
1 drawing per side of page use the space

Multiple Choice
Question #
Section
Concept
Answer
1
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