3.3 Taxes Flashcards
Revise general responses info, sensing processes, innate & learned behaviours, taxes and kinesis (tropism and nasty)
What is behaviour?
Ways in which an animal responds to its environment
What is an adaptive behaviour?
A behaviour that enables an organism to adjust to a particular situation or environmental cue
Why do organisms have responses? (4 pts)
Find more favourable environments
Reduce competition
Avoid predation/herbivory
Find a mate
What are receptors?
Cells or otherwise that can detect environmental change
What are effectors?
Organs that produce an effect in response to nerve behaviour
What is a stimulus?
Change that stimulates behaviour?
The three core stages of sensing and responding to the environment:
- Receptor is stimulated, sends nerve signals to CNS
- Signal received by CNS, new signal sent to effector
- Signal received by effector, organism response initiated
Innate behaviours are…? (4pt)
Heritable, intrinsic, stereotypic, inflexible
Learned behaviours are? (4pt)
Non-inheritable, extrinsic, adaptable, progressive
What do heritable and non-inheritable mean?
Heritable is coded in DNA, non-inheritable is acquired through observation and experience
What do intrinsic and extrinsic mean?
Intrinsic is present in animals raised in isolation, extrinsic is absent in animals raised in isolation
What do stereotypic and adaptable mean?
Stereotypic is performed in the same way each time, adaptable is capable of modification to suit changing conditions
What do inflexible and progressive mean?
Inflexible is not modified by experience (ie they’re born with it), progressive is subject to improvement through practice (not born with it).
What is taxis?
Movement of a whole organism in response to an external directional stimulus
What is tropism?
Movement of a plant or part of a plant in response to an external directional stimulus
