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PE Investigation 6
Test Description: Biomass trophic levels
Instructions: Answer all questions to get your test result.
1) Which list represents the ways in which organisms use energy?
A
movement, maintenance, growth and reproduction, waste production
B
maintenance, waste production, eating food, sleeping
C
waste production, movement, growth and reproduction, eating food
D
movement, sleeping, eating food, swimming
2) Planktonic algae come down with an illness. What happens as the toxins move up the food chain?
A
The toxins bioaccumulate and become more concentrated at each trophic level.
B
The toxins affect the algae, killing them. This brings down the rest of the food web.
C
The illness kills off the algae fast enough that nothing else can be affected.
D
The toxins do not continue up the trophic levels.
3) Which trophic level has the greatest quantity of biomass?
A
secondary consumers
B
primary consumers
C
producers
D
tertiary consumers
4) Which trophic level has the least quantity of biomass?
A
tertiary consumers
B
primary consumers
C
producers
D
secondary consumers
5) What is the original source for all organisms in any food web?
A
Humans
B
The Sun
C
The producers
D
The consumers
6) How much energy is able to travel up to the next trophic level from the one before?
A
10%
B
80%
C
20%
D
90%
7) What is the majority of energy used for in organisms?
A
For getting more food to keep up a good amount of energy.
B
Reproduction and growth only.
C
Daily activities, and some is lost to the environment as body heat.
D
It is used so the organism can walk.
8) Why are layered ecosystem diagrams in the shape of pyramids?
A
The lower the level, the less the amount of biomass.
B
There are fewer tertiary consumers.
C
The higher the level, the less the amount of biomass.
D
The higher the level, the greater the amount of biomass.
9) Where do decomposers go in trophic pyramids?
A
They are shown in each level of the trophic pyramid.
B
They are shown along the side of the pyramid.
C
They do not go anywhere near trophic pyramids.
D
They are shown as fourth-level consumers.
10) What role do decomposers play in food webs?
A
They break down energy molecules in biomass, returning them to chemicals and releasing them into the environment.
B
They produce feces for the detritivores.
C
They eat dead material, leaving the nutrients for the detritivores.
D
They provide a film of dead organic matter.
*select an answer for all questions
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