Animal and plant responses Flashcards

1
Q

Cytokinins

A

Very similar role to auxins. Promotes cell division. Promotes lateral budding rather than apical

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2
Q

Absisic acid

A

Promotes seed and bud dormancy. Prevents seeds germinating while attached to the parent

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3
Q

Allelopathy

A

A plant produces and releases a chemical that prevents or inhibits the growth of the other plant species in the area around it.

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4
Q

Commensalism

A

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)

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5
Q

Competition

A

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 (-,-)

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6
Q

Chemotaxis

A

The directional movement of an animal in response to chemicals in the environment

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7
Q

Biological clock

A

The mechanism that produces regular periodic changes in behaviour or physiology due to an internal clock

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8
Q

Batesian mimicry

A

A harmless organism copies the pattern of a dangerous organism to get protection

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9
Q

Actogram

A

Graphical representation of an organism’s activity during a day.

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10
Q

Auxin

A

Shoot hormone

Regulate plant growth, cell division, cell elongation, differentiation apical dominance.

Promotes lateral root formation and promotes flowering

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11
Q

Circa

A

Rhythm of about …….. e.g circadian (about a day)

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12
Q

Circadian rhythm

A

Behaviour in an organism which is approximately 24 hours a solar day

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13
Q

Circalunar rhythm

A

Behaviour in an organism which is about 29.5 days approximates the cycle of a lunar month

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14
Q

Circannual rhythm

A

Behaviour in an organism which is approximately 365 1/4 days - the cycle of a solar year

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15
Q

Circatidal rhythm

A

Behaviour in an organism which is about 12.5 hours - approximates the cycle of tides

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16
Q

Complex hierarchy

A

Is a social structure in which each has a relative position of dominance

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17
Q

Cooperative breeding

A

A breeding system in which members of an extended family all help in the rearing of offspring.

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18
Q

Cooperative defence

A

Where members of a group combine their strengths to defend against predators

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19
Q

Courtship behaviour

A

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

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20
Q

Crepuscular animals

A

A plant in which flowering can occur irrespective of the day length

21
Q

Crepuscular animals

A

Animals that are most active at dawn and dusk

22
Q

Dominance

A

Behaviour showing by an individual that is higher in a hierarchy that the individual it is relating with

23
Q

Endogenous

A

Rhythm controlled by an internal biological clock due to their DNA

24
Q

Entrainment

A

The resetting of the biological clock on a regular basis, forcing it ti take up the period of the environmental cycle

25
Q

Environmental cues

A

A change in the external environment that triggers a change in behaviour or physiology

26
Q

Free running period

A

The period of a biological rhythm in the absence of external environmental cues

27
Q

Geotaxis

A

The directional movement of an animal in response to gravity

28
Q

Herbivorism

A

Form of exploitation where one animal eats a plant (+ -).

29
Q

Indoleacetic acid

A

A naturally occurring auxin, synthesised in the shoot tips and responsible for cell elongation in

30
Q

Innate behaviour

A

Behaviour which is controlled by our biological clock

31
Q

Interspecific relationships

A

Interactions between different species

32
Q

Intraspecific relationships

A

Interactions between members of the same species

33
Q

Kinesis

A

The non-directional movement of an organism in response to a stimulus in which rate of movement depends on the intensity of the stimulus

34
Q

K-strategy

A

A reproductive strategy where the parents produce few young and give them lots of parental care. Most young survive

35
Q

r-strategy

A

A reproductive strategy where the parents use their energy to produce lots of offspring but give no parental care to the young. Lots of the young die early

36
Q

Mutualism

A

A relationship where two species both benefit from the relationship (+,+)

37
Q

Mullerian mimicry

A

Two or more poisonous species have similar colouration therefore get protection

38
Q

Tropism

A

Directional growth of a plant towards or away from a stimulus

39
Q

Long day plant

A

A plant in which flowering can be induced or enhanced by long days (short nights), usually with more than 12 hours of daylights

40
Q

Parasitism

A

A form of exploitation where one species lives an another to obtain food (+,-)

41
Q

Phototropism

A

The directional growth of plant organs in response to light. Shoots usually grow towards light

42
Q

Phytochrome

A

A pigment that exists in two forms- Pr and Pfr.

During the day Pr-> Pfr and at night Pfr->Pr. If a plant is an LDP you will have high conc. of Pfr and this will initiate flowering, while if an SDP high conc. of Pf (lower conc. of Pfr) initiate flowering

43
Q

Photonasty

A

Response to light

44
Q

Navigation tropism

A

A plant growth response away from a stimulus

45
Q

Nastic movement

A

Non-directional movement of plants in response to external stimuli

46
Q

Nyctinasty

A

Response to night

47
Q

Gibberellin

A

Breaks seeds and bud dormancy (opposite to Absisic acid)

48
Q

Geotropism

A

The directional growth of plant organs in response to gravity

49
Q

Exploitation

A

An interaction between species in which one benefits by using the other as a source of food or shelter (+,-)