Ecology (A2)

Plant Growth Factors

• Plants response to external stimuli is through plant growth factors: o They exert their influences by effecting growth which ...
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Energy Transfer

Measuring Biomass • Biomass can be calculated by measuring the mass of carbon that an organism contains or by the ...
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Energy loss in Food Chains

Photosynthesis Limiting Factors • >90% of sun’s energy is reflected or absorbed by clouds/dust • Not all wavelengths of sunlight ...
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Variation

“Within any population there is a range of alleles which leads to a wider range of phenotypes.” Cause of Variation ...
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Succession

• Succession is the process by which an ecosystem changes over time • Succession occurs in a series of stages ...
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Mark-Release-recapture

Method: 1) Capture a sample of species using an appropriate technique 2) Mark them in a harmless way (e.g. a ...
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Abundance and Distribution of a population

Test Method Positive Test Results Extra Primary, Secondary, and tertiary Alcohols 1)      Add potassium dichromate solution ·        Primary and secondary ...
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