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Biology 20-1 Unit B (Alberta Curriculum) Questions And Answers
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Biology 20-1 Unit B (Alberta Curriculum) Questions And Answers Permafrost Permanently frozen soil. Muskeg Soil above the permafrost that is swampy or boggy in summer. Understorey Below the canopy layer; usually shrubs and smaller trees. Littoral Zone The area from the shore of a lake or pond t...

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  • November 12, 2024
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  • 2024/2025
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Biology 20-1 Unit B (Alberta Curriculum)
Questions And Answers

Permafrost Permanently frozen soil.




Muskeg Soil above the permafrost that is swampy or boggy in summer.




Understorey Below the canopy layer; usually shrubs and smaller trees.




Littoral Zone The area from the shore of a lake or pond to the point where no more plants

grow in the lake bottom.




Limnetic Zone The area of a lake or pond in which there is open water and sufficient light

for photosynthesis to occur.




Plankton Autotrophic and heterotrophic microorganisms found in the limnetic zone of a

lake or pond.




Profundal Zone The region of a lake beneath the limnetic Zone, in which there is

insufficient light for photosynthesis to occur.

, Biology 20-1 Unit B (Alberta Curriculum)
Questions And Answers

Litter The upper layer of soil, composed mainly of partially decomposed leaves or

grasses.




Topsoil The soil layer beneath the litter, composed of small particles of rock mixed with

humus.




Humus Decaying plant and animal matter.




Subsoil The soil layer beneath the topsoil, usually containing more rock particles and less

organic matter than the topsoil.




Bedrock The layer beneath the soil, composed of rock.




Epilimnion The upper level of a lake, which warms up in summer.




Hypolimnion The lower level of a lake, which remains at a low temperature year round.

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