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16 Cards in this Set

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An ecological factor that makes up part of the non-biological environment of an organism, e.g. temperature, pH, rainfall and humidity.

Adenosine triphosphate (ATP)

An activated nucleotide found in all living cells that acts as an energy carrier. The hydrolysis of ATP leads to the formation od ADP and inorganic phosphate, with the release of energy.


Connected with the presence of oxygen. Aerobic respiration requires oxygen to release energy from glucose and other foods.


One form of a gene. For example, the gene for the shape of pea seeds has two alleles: one for 'round' and one for 'winkled'.


Connected with the absence of oxygen. Anaerobic respiration releases energy from glucose or other foods without the presence of oxygen.


The range and variety of living organisms within a particular area.


The total mass of living material in a specific area at a given time. It is usually measured as dry mass because the amount of water in an organism is very variable


An ecological factor that makes up part of the living environment of an organism. Examples include food availability, competition, and predation

Climax Community

The organisms that make up the final stage of ecological succession


Condition in which both alleles for one gene in a heterozygous organism contribute to the phenotype


The organisms of all species that live in the same area


Method of maintaining ecosystems and the living organisms that occupy them. It requires planning and organisation to make best use of resources while preserving the natural landscape and wildlife


Any organism that obtains energy by 'eating' another. Organisms feeding on plants are known as primary consumers and organisms feeding on primary consumers are known as secondary consumers

Dominant allele

A term applied to an allele that is always expressed in the phenotype of an organism

Ecological niche

All conditions and resources required for an organism to survive, reproduce and maintain a viable population


More or less self-contained functional unit in ecology made up of all the interacting biotic and abiotic factors in a specific area