496707
Beschreibung
Mindmap von prettypriyaz, aktualisiert more than 1 year ago
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Erstellt von prettypriyaz
vor fast 11 Jahre
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Responses
- Animal
- Taxis is a directional response
to stimulus.
- Positive
- Movement is towards the
stimulus.
- Movement is towards the
stimulus.
- Negative
- Movement is away from the
stimulus.
- Movement is away from the
stimulus.
- Examples
- Phototaxis (Light)
- Maggots use negative phototaxis to move
away from light to avoid exposure and
dryness.
- Single celled algae use positive
phototaxis to move towards light
to photosynthesis.
- Maggots use negative phototaxis to move
away from light to avoid exposure and
dryness.
- Phototaxis (Light)
- Chemotaxis (chemicals)
- Male moths use positive chemotaxis when flying
towards a pheromone
- Male moths use positive chemotaxis when flying
towards a pheromone
- Positive
- Kinesis is a response to a changing stimulus
by changing the amount of activity.
- Orthokinesis
- the speed of movement varies with the intensity of
the stimulus.
- the speed of movement varies with the intensity of
the stimulus.
- Klinokinesis
- the rate of turning depends on the intensity of the
stimulus.
- the rate of turning depends on the intensity of the
stimulus.
- Results in random movements.
- It is designed to bring the organism back
into favourable conditions.
- It is designed to bring the organism back
into favourable conditions.
- Example
- In dry environments woodlice move quickly and don't turn much
which increases their chance moving out of the area.
- If by chance, they find themselves in a humid environment ,
they slow down and increase the rate of turning. This tend to
keep them in a humid area.
- If by chance, they find themselves in a humid environment ,
they slow down and increase the rate of turning. This tend to
keep them in a humid area.
- In dry environments woodlice move quickly and don't turn much
which increases their chance moving out of the area.
- Orthokinesis
- Taxis is a directional response
to stimulus.
- Plants
- Tropism is a directional growth responses to
stimulus.
- Positive
- Growing towards the stimulus
- Growing towards the stimulus
- Negative
- Growing away from the stimulus
- Growing away from the stimulus
- Positive
- Example
- Phototaxis (Light)
- Plants shoot grow towards the light so their leaves are
in the favourable position to absorb sunlight.
- Plants root grow away from the light and towards gravity
to absorb more minerals ions.
- Plants shoot grow towards the light so their leaves are
in the favourable position to absorb sunlight.
- Phototaxis (Light)
- Tropism is a directional growth responses to
stimulus.
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