Defence Mechanisms & Symbiotic Relationships
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Transcript of Defence Mechanisms & Symbiotic Relationships
Mechanismsdefence
andsymbioticrelationships
Defencemechanisms
Adaptations that organisms develop or are born with that help
protect them against predators
try this: write down 2 examples of defence mechanisms from your prior knowledge
CO-EVOLUTION
how organisms have adapted to and become resistant towards
certain toxins
protective
Adaptations that help individuals avoid predation
through body coloration
coloration
CAMOUFLAGE
Dead Leaf ButterflyBrownish & veiny patterned wings that resemble a Leaf
warning coloration
Eastern Coral Snake(highly venomous)
mimicrya defence strategy used to imitate the warning colors
of other poisonous organisms
batesianinvolves a harmless
organism mimicking a HARMFUL one
Syrphid Fly
mülleriantwo or more poisonous species mimicking each
other
Poison Arrow Frog
Symbiosis
An ecological relationship between two
species living in direct contact
parasitismone species lives off of and harms
the host
parasitismone species lives off of and harms
the host
ectoparasites live outside
of their host
parasitismone species lives off of and harms
the host
ENDOPARASITES are typically unicellular organisms
parasitismone species lives off of and harms
the host
A PARASITOID IS A WASP
PARASITE THAT KILLS ITS HOST
Adzuki Bean Weavil Wasp
host-parasite cycle
refer to the activity page!
ectoparasite parasitoid
(tree)
mutualism
both species benefit from
the relationship
positive effect on growth of
both populations
mutualism
mutualism
refer to the activity page!
mutualistic relationship
COMMENSALISM
one species benefits,
the other is unaffected
commensal organism
obtains shelter,
locomotion, food, etc.
COMMENSALISM
COMMENSALISM
COMMENSALISMCompetitive : - / -
Host/Parasite : - / +
Predator/Prey : + / -
Mutualistic : + / +
Interspecific Interactions