Animal and plant responses Flashcards
Cytokinins
Very similar role to auxins. Promotes cell division. Promotes lateral budding rather than apical
Absisic acid
Promotes seed and bud dormancy. Prevents seeds germinating while attached to the parent
Allelopathy
A plant produces and releases a chemical that prevents or inhibits the growth of the other plant species in the area around it.
Commensalism
A relationship between two animal or plant species that live together in which one species benefits from the association while the other is not significantly affected (+,0)
Competition
A relationship between two or more organisms, populations, or species that share some environmental resource when it is in short supply. Both organisms are harmed (-,-)
Chemotaxis
The directional movement of an animal in response to chemicals in the environment
Biological clock
The mechanism that produces regular periodic changes in behaviour or physiology due to an internal clock
Batesian mimicry
A harmless organism copies the pattern of a dangerous organism to get protection
Actogram
Graphical representation of an organism’s activity during a day.
Auxin
Shoot hormone
Regulate plant growth, cell division, cell elongation, differentiation apical dominance.
Promotes lateral root formation and promotes flowering
Circa
Rhythm of about …….. e.g circadian (about a day)
Circadian rhythm
Behaviour in an organism which is approximately 24 hours a solar day
Circalunar rhythm
Behaviour in an organism which is about 29.5 days approximates the cycle of a lunar month
Circannual rhythm
Behaviour in an organism which is approximately 365 1/4 days - the cycle of a solar year
Circatidal rhythm
Behaviour in an organism which is about 12.5 hours - approximates the cycle of tides
Complex hierarchy
Is a social structure in which each has a relative position of dominance
Cooperative breeding
A breeding system in which members of an extended family all help in the rearing of offspring.
Cooperative defence
Where members of a group combine their strengths to defend against predators
Courtship behaviour
Behaviour in animals that plays a part in the initial attraction of a mate or as a prelude to mating. These are often species-specific