1 Which of the following relationships between organisms is an example of parasitism? A A clown fish swims among the stinging tentacles of a sea anemone and eats leftovers from
the anemone's meals. The clown fish is not harmed by the stinging tentacles. The sea
anemone is unaffected by the clown fish.
B Barnacles are a type of shellfish that often attach themselves to a whales's skin. The
barnacles filter feed off of food particles carried to them from the movement of water around
the swimming whale. the whale is not harmed nor helped by the barnacles.
C Mistletoe is a species of plant that grows into the tissue of some tree species and uses the
tree as a source for its nutrients. The tree can be harmed by an overgrowth of mistletoe in
its branches.
D Broad-leaved trees such as hickory grow tall, spreading their branches and leaves. The
canopy from the hickory trees blocks out sunlight from shorter trees that also need the
sunlight for photosynthesis. The shorter trees cannot grow as well in the shade of the hickory
trees.