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Biology 20-1 Unit B (Alberta Curriculum) Exam Questions and Answers
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Biology 20-1 Unit B (Alberta Curriculum) Exam Questions and Answers
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Biology 20-1 Unit B (Alberta Curriculum)Exam Questions and Answers
Ecology - Answers -The study of interactions between organisms and their living and
non-living environment.
Abiotic Factor - Answers -A non-living factor that influences an organism.
Biotic Factor - Answers -A living factor that influences an organism.
Ecotone - Answers -A transition area between ecosystems.
Ecological Niche - Answers -An organism's role in an ecosystem, consisting of its place
in the food web, it's habitat, it's breeding area, and the time of day at which it is most
active.
Biome - Answers -A large geographical region with a specific range of temperatures and
precipitation, and the organisms that are adapted to those conditions of temperature
and precipitation.
Canopy - Answers -The upper layer of vegetation in a forest.
Permafrost - Answers -Permanently frozen soil.
Muskeg - Answers -Soil above the permafrost that is swampy or boggy in summer.
Understorey - Answers -Below the canopy layer; usually shrubs and smaller trees.
Littoral Zone - Answers -The area from the shore of a lake or pond to the point where no
more plants grow in the lake bottom.
Limnetic Zone - Answers -The area of a lake or pond in which there is open water and
sufficient light for photosynthesis to occur.
Plankton - Answers -Autotrophic and heterotrophic microorganisms found in the limnetic
zone of a lake or pond.
Profundal Zone - Answers -The region of a lake beneath the limnetic Zone, in which
there is insufficient light for photosynthesis to occur.
, Litter - Answers -The upper layer of soil, composed mainly of partially decomposed
leaves or grasses.
Topsoil - Answers -The soil layer beneath the litter, composed of small particles of rock
mixed with humus.
Humus - Answers -Decaying plant and animal matter.
Subsoil - Answers -The soil layer beneath the topsoil, usually containing more rock
particles and less organic matter than the topsoil.
Bedrock - Answers -The layer beneath the soil, composed of rock.
Epilimnion - Answers -The upper level of a lake, which warms up in summer.
Hypolimnion - Answers -The lower level of a lake, which remains at a low temperature
year round.
Thermocline - Answers -The zone between the epilimnion and hypolimnion, in which
temperature changes rapidly.
Biotic potential - Answers -The maximum number of offspring that a species could
produce with unlimited resources.
Carrying Capacity - Answers -The maximum number of individuals of a species that can
be supported by an ecosystem.
Law of the Minimum - Answers -States that the nutrient in the least supply is the one
that limits growth.
Law of Tolerance - Answers -States that an organism can survive within a particular
range of an abiotic factor.
Density-Independent factor - Answers -A factor in an ecosystem that affects members
of a population regardless of population density.
Density-Dependant factor - Answers -A factor in an ecosystem that affects members of
a population because of the population density.
Slash-and-burn - Answers -The complete clearing of a forest by felling and burning
trees.
Selective Cutting - Answers -The harvesting of only certain trees from an area.
Prescribed Burn - Answers -A controlled fire set intentionally in a designated area.
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