2.5 Criteria Flashcards
Regulators are unable to maintain their internal environment when what?
When the external environment varies beyond tolerable limits for normal metabolic activity.
What is dormancy ?
It is part of a life cycle allowing survival during conditions when the energy costs of metabolic activity would be too high.
During dormancy why is the metabolic rate reduced?
To save energy.
When does predictive dormancy occur?
Before the onset of adverse conditions.
When does consequential dormancy occur?
After the onset of adverse conditions.
How do certain mammals survive the winter/low temperatures?
Hibernating.
What are three examples of animals that hibernate:
Dormouse, bat and hedgehog.
How do certain animals survive high temperatures/droughts?
Aestivation.
What are three examples of animals that aestivate?
Snail, earthworm and lizards.
Does aestivation require more or less energy than hibernation? Why?
Less, because here is no need to maintain a minimum body temperature.
What is daily torpor?
It is when some animals with high metabolic rates can temporarily reduce their metabolic rates.
What is an animal that uses daily torpor?
Hummingbird.
Why might animals expend energy to migrate?
To avoid adverse environmental conditions.
What is migration?
A regular pattern of behaviour and involves relocating to an area with more suitable environmental conditions.
What is meant by ‘Migratory behaviour has an inflexible innate element ‘?
Means it is inherited and is carried out by all individuals.
