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Biology Questions

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1.
1 point
The top middle of a lake is called the __?___ zone.
2.
1 point
Humus is found in the:
3.
1 point
What trophic level gets the least amount of energy?
4.
1 point
Nitrogen is made into a useful form for living things by lightning and:
5.
1 point
Buildup of dangerous chemicals up the food chain is called:
6.
1 point
Water carrying dissolved materials away from the soil is called:
7.
1 point
sugar + oxygen --> water + carbon dioxide + useful energy
This is the formula for:
8.
1 point
The layer of gases around the earth is called the:
9.
1 point
Which of the following is not an indicator of a polluted lake?
10.
1 point
How can carbon dioxide be removed from the atmosphere?
11.
1 point
An organism that eats both plants and animals is called a:
12.
1 point
The most reliable but hardest pyramid to construct is a pyramid of:
13.
1 point
Which of the following increased the population size?
14.
1 point
A species introduced to a new area replacing other native species is called:
15.
1 point
What type of organism is always at the start of a food chain?
16.
1 point
The type of soil that best holds onto water is:
17.
1 point
A cold, clear lake is called:
18.
1 point
A biotic factor is:
19.
1 point
A species that no longer exists where it once did, but is found in healthy numbers in other locations, is said to be:
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