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HIGHER BIOLOGY
UNIT 2
2.5 - metabolism and adverse conditions
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Eilidh Robertson
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Cards (18)
What are 2 adaptation strategies for organisms to deal with adverse conditions?
dormancy
migration
What are the 2 types of dormancy?
predictive
consequential
Dormancy
is used to
survive adverse conditions
whereas
migration
is used to
avoid adverse conditions
During dormancy there is a decrease in:
Metabolic
rate
heart
rate
breathing
rate
body temperature
Advantage of consequential dormancy?
organisms
are
active
and
utilising resources
for
longer
Disadvantage of consequential dormancy?
if organisms cannot
enter dormancy
after
onset
of
adverse conditions
,
death
is likely
What is predictive dormancy?
occurs
before
the
onset
of
adverse conditions
What is consequential dormancy?
occurs
after
the
onset
of
adverse conditions
What are 3 common examples of dormancy?
hibernation
(
winter
sleep)
aestivation
(
summer
sleep)
daily torpor
(
power
nap)
Define hibernation?
dormancy brought about by low temperature
Define aestivation?
dormancy brought about by high temperature
Define daily torpor?
daily period
of
dormancy
for
organisms
with
high metabolic rates
how does migration avoid metabolic adversity?
Expending energy
to
relocate
to a
more suitable environment.
Often
long distance movement
on a
seasonal basis
What are the 2 types of migration?
innate
learned
What is innate behaviour?
inherited
and
inflexible
What is learned behaviour?
gained by
experience
and flexible
What are 3 external signs of migration?
decreased day length
decreased air temperature
Change
in
air pressure
How can migration be tracked?
individual marking
tracking
devices