RHHS Grade 12 Biology 2015

1. Mechanisms
defence
and
symbiotic
relationships

2. Defence
mechanisms
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

3. CO-EVOLUTION
how organisms have adapted to
and become resistant towards
certain toxins

4. protective
Adaptations that help
individuals avoid predation
through body coloration
coloration

5. CAMOUFLAGE
Dead Leaf Butterfly
Brownish
& veiny
patterned
wings that
resemble
a Leaf

6. warning
coloration
Eastern
Coral Snake
(highly venomous)

7. mimicry
a defence strategy used to
imitate the warning colors
of other poisonous
organisms

8. batesian
involves a harmless
organism mimicking a
HARMFUL one
Syrphid Fly

9. müllerian
two or more poisonous
species mimicking each
other
Poison Arrow
Frog

11. Symbiosis
An ecological
relationship
between two
species living
in direct
contact

12. parasitism
one species
lives off of
and harms
the host

13. parasitism
one species
lives off of
and harms
the host
ectoparasites
live outside
of their host

14. parasitism
one species
lives off of
and harms
the host
ENDOPARASITES
are typically
unicellular
organisms

15. parasitism
one species
lives off of
and harms
the host
A PARASITOID
IS A WASP
PARASITE THAT
KILLS ITS HOST

16. Adzuki Bean Weavil
Wasp

17. host-parasite cycle

18. refer to the activity page!
ectoparasite parasitoid
(tree)

19. mutualism
both species
benefit from
the
relationship
positive effect
on growth of
both
populations

20. mutualism

21. mutualism

23. refer to the activity page!
mutualistic relationship

24. COMMENSALISM
one species
benefits,
the other is
unaffected
commensal
organism
obtains
shelter,
locomotion,
food, etc.

25. COMMENSALISM

26. COMMENSALISM

27. COMMENSALISM
Competitive : - / -
Host/Parasite : - / +
Predator/Prey : + / -
Mutualistic : + / +
Interspecific Interactions