This is our presentation on Activity 12

1. ACTIVITY 12
Cherlyn, Anurag M, Sean and Zhi Yong

2. PREDATOR-PREY
• Cat and Mouse:
• The cat eats the mouse.

3. PARASITISM
• Phorid fly and the leaf-cutter
ant:
• When the leaf-cutter ant
is going back to its nest
the phorid fly fly over and
tends lays its eggs in the
crevice of the worker ant.

4. MUTUALISM
• Trees and Humans:
• Humans give out Carbon
Dioxide(CO2) which the
plants need and the plants
give out Oxygen(O2)
which humans need.

5. COMMENSALISM
• Barnacles and Whales:
• When the whales travel
the barnacles get access to
nutrient rich waters and
sometimes the morsels of
food left behind by the
whale.

6. THANK YOU.
© COPYRIGHT 2013 ANURAG MAHLAWAT. ALL RIGHTS RESERVED.
ACKNOWLEDGMENTS:
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WIKIPEDIA
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SOFTWARES USED:
IWORK ’09