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NCEA Level 3 Biology - Plant and Animal Responses

Abiotic Factors

Non living environmental factors affecting an organism

Biotic Factors

Living factors affecting an organism

Intraspecific Competition

Competition between different species

Interspecific Competition

Competition between organisms of the same species


Movement towards or away from a stimulus

Structural, Behavioral, Physiological, Life History

The 4 different adaptation an organism can have


One animal kills another for food


One organism feeds off another but does not kill it


One organism benifits while the other is harmed


One organism secretes a substance to inhibit the growth of another


Relationship where both organisms benifit


One species benifits while the other is not affected


Ritualised behaviour between members of the same species to facilitate sexual reproduction


Non-directional response to the speed of an organism


Non-directional response to the random tuning and movement of an organism


Environmental stimulus that resets an organisms biological clock


Mass movement of a population from one area to another


An animals ability to return home from unfamiliar territory


Directional growth towards or away from a stimulus

Nastic movements

Non-directional responses to a stimulus most often found in plants

Circadian Rhythm

A daily rhythm of an organism

Endogenous Rhythm

Internal rhythms such as a biological clock that do not necessarily completely connect with with external abiotic cues

Exogenous Rhythm

Rhythms that are derived from an external cue such as sunlight or tide


regulation of flowering by a period of chilling


closely guarded area where organisms give birth and care for offspring

Home Range

Wider area that the territory that organisms hunt for food,gether water etc.


The changing of an environment due to competition over time

Primary succession

The colonisation of new ground, could be a volcanic area or a slip

Secondary succession

The colonisation of vacant but fertile ground


Chemical that causes cells in plants to elongate and therefore grow towards or away from a stimulus


This is what absorbs the light in plants


Increase inter-node length causing long day plants to flower. Helps mobilise endosperm and promotes germination of a wide variety of seeds


Promotes cell division


Leaf fall, aim is to prevent water loss in cells so that the water in leaves does not freeze

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