Level 3 Biology Animal and Plant Terms

Process by which an internal clock becomes reset by rhythmic environmental conditions.

Growth hormone which plays an essential part in tropisms – causes cell elongation.

Members of a group arranged in positions of dominance or subordinance to reduce aggression.

Orientation of an animal - rate of the movement depends on the intensity of the stimulus.

Ritualised behaviour between animals to assert dominance

Plant that flowers when day length is less than a certain minimum value.

Ability of an organism to find its way home over unfamiliar territory.

Rhythm with a period of about one tidal cycle when under constant environmental conditions.

Peaks of an endogenous rhythm are advanced or retarded in response to a changed exogenous cue.

You can put a positive or negative prefix for a nastic response in plants

Differences in sexes, not including the sexual organs (e.g. tooth size, plumage, size, pelvis).

An external environmental cue "Time giver" by which an internal clock is reset.

Active at night, active at day, active at dawn and dusk (in order)

Behaviour (e.g. standing erect) which shows a status higher than another individual.

Rhythm with a period of about a day when under constant environmental conditions.

A graph showing the activity of an organism over a period of time.

You can put a positive or negative prefix for a kinesis response shown by an animal

Prefix for animal or plant responses to light, chemicals, gravity and water current IN ORDER

Night length below which long-day plants flower and above which short-day plants flower.

A series of signals exchanged between males and females, often ending in mating.

Mass movement of a species, usually a two way journey at regular intervals, long distances.

Rhythm with a period of about a year when under constant environmental conditions.

Behaviour (e.g. head bowing in seagulls) showing a status lower than another individual.

Rhythm with a period of about a lunar month when under constant environmental conditions.

Relationship between two organisms where both benefit (e.g. crocodile and tick bird).

Situation when demand for a resource (e.g food) exceeds supply.

what type of tropism is shown in this picture?

General term for behaviours which help the group survive (e.g.breeding, territory, hierarchy).

Plant that flowers when day length exceeds a certain minimum value.

Behaviour which is not learned over time - behaviour the organism is born with (coded in genes)

Reversable movements in plant parts-response to the presence or absence of external stimuli

Movement of an animal - direction of the movement depends on the direction of the stimulus.

Aggressive behaviour between members of the same species. Can result in death or severe injury

Using the sun to find the direction of migration. Must compensate for the suns daily movement.

When several unpalatable organisms resemble each other to gain benefit - eg

Prefix for behaviour responses to touch

An innate internal mechanism controlling the physiological activities of an organism (timing)

Plant that flowers when day length is less than a certain minimum value.

Rhythm with an internal origin, independent of changes in the external environment.