If an ecosystem contained grasses, grasshoppers, birds, and snakes, what about how much energy would the bird receive?
1%
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15
What type of organisms are responsible for "fixing" nitrogen or helping to put it in a form so other living things can use it?
bacteria
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5
Where does the original source of energy come from in an ecosystem?
the sun
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15
What process removes carbon from the atmosphere?
photosynthesis
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15
What would happen if the decomposers were removed?
nutrients would not be returned to the soil
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25
Give 2 reasons why nutrient cycles are important. Be specific in what they are used for in terms of macromolecules.
CHONP (carbs, lipids, proteins, nucleic acids)
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25
Energy is transferred between trophic levels in a food pyramid. If 1,250 joules of energy is in the producers how much energy would be transferred to the tertiary consumers?
1.25 Joules
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baam
Lose 25 points!
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magnet
Take 15 points!
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rocket
Go to first place!
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lifesaver
Give 5 points!
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15
Which of the following would be a limiting factor for a population? (decrease in competition, fewer predators, reduction of disease, loss of habitat)?
loss of habitat
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seesaw
Swap points!
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gold
Win 50 points!
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gift
Win 25 points!
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thief
Give points!
5
10
15
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25
15
How does transpiration play a role in the water cycle?
it returns water vapor to the atmosphere from a plant
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15
Why are decomposers in soils and water important to ecosystems?
they recycle nutrients
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15
Why are nutrient cycles described as being a closed loop?
elements pass between organisms and physical spaces within the biosphere
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15
Describe the impact of all the grass being killed by a herbicide.
all other trophic levels would see a decrease
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15
What is a factor that would cause a decrease in population growth?
Any acceptable answer (deaths, disease, emigration, etc.)