PE Investigation 6 Question Preview (ID: 46927)
Biomass
Trophic Levels.
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Which list represents the ways in which organisms use energy?
a) movement, maintenance, growth and reproduction, waste production
b) movement, sleeping, eating food, swimming
c) maintenance, waste production, eating food, sleeping
d) waste production, movement, growth and reproduction, eating food
Planktonic algae come down with an illness. What happens as the toxins move up the food chain?
a) The toxins do not continue up the trophic levels.
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 bioaccumulate and become more concentrated at each trophic level.
Which trophic level has the greatest quantity of biomass?
a) producers
b) primary consumers
c) secondary consumers
d) tertiary consumers
Which trophic level has the least quantity of biomass?
a) producers
b) primary consumers
c) secondary consumers
d) tertiary consumers
What is the original source for all organisms in any food web?
a) The producers
b) The Sun
c) The consumers
d) Humans
How much energy is able to travel up to the next trophic level from the one before?
a) 90%
b) 80%
c) 20%
d) 10%
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.
Why are layered ecosystem diagrams in the shape of pyramids?
a) The higher the level, the greater the amount of biomass.
b) The lower the level, the less the amount of biomass.
c) There are fewer tertiary consumers.
d) The higher the level, the less the amount of biomass.
Where do decomposers go in trophic pyramids?
a) They are shown as fourth-level consumers.
b) They are shown along the side of the pyramid.
c) They are shown in each level of the trophic pyramid.
d) They do not go anywhere near trophic pyramids.
What role do decomposers play in food webs?
a) They eat dead material, leaving the nutrients for the detritivores.
b) They produce feces for the detritivores.
c) They provide a film of dead organic matter.
d) They break down energy molecules in biomass, returning them to chemicals and releasing them into the environment.
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