NCEA Level 3 Biology - Plant and Animal Responses
Circadian Rhythm
A daily rhythm of an organism
Mutualism
Relationship where both organisms benifit
Exogenous Rhythm
Rhythms that are derived from an external cue such as sunlight or tide
Courtship
Ritualised behaviour between members of the same species to facilitate sexual reproduction
Home Range
Wider area that the territory that organisms hunt for food,gether water etc.
Auxin
Chemical that causes cells in plants to elongate and therefore grow towards or away from a stimulus
Intraspecific Competition
Competition between different species
Interspecific Competition
Competition between organisms of the same species
Tropism
Directional growth towards or away from a stimulus
Zeitgieber
Environmental stimulus that resets an organisms biological clock
Homing
An animals ability to return home from unfamiliar territory
Gibberellins
Increase inter-node length causing long day plants to flower. Helps mobilise endosperm and promotes germination of a wide variety of seeds
Endogenous Rhythm
Internal rhythms such as a biological clock that do not necessarily completely connect with with external abiotic cues
Abcission
Leaf fall, aim is to prevent water loss in cells so that the water in leaves does not freeze
Biotic Factors
Living factors affecting an organism
Migration
Mass movement of a population from one area to another
Taxis
Movement towards or away from a stimulus
Abiotic Factors
Non living environmental factors affecting an organism
Klinokinesis
Non-directional response to the random tuning and movement of an organism
Orthokinesis
Non-directional response to the speed of an organism
Nastic movements
Non-directional responses to a stimulus most often found in plants
Predation
One animal kills another for food
Amensalism
One organism benifits while the other is harmed
Parasitism
One organism feeds off another but does not kill it
Alleopathy
One organism secretes a substance to inhibit the growth of another
Commensalism
One species benifits while the other is not affected
Cyokinins
Promotes cell division
Structural, Behavioral, Physiological, Life History
The 4 different adaptation an organism can have
Succession
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
Riboflavin
This is what absorbs the light in plants
Territory
closely guarded area where organisms give birth and care for offspring
Vernalisation
regulation of flowering by a period of chilling
