Download algae. \

Symbiotic Relationships
I.
The remora fish uses suckerlike modifications of the dorsal fin to attach itself temporarily to a shark. When
the shark feeds, thp remora picks up floating scraps of food for itself.
The shiuk doesn't seem to care at all.
-Ii.
A lichen is actually a combination of two different species of organisms - a lungus and an algae. The algae,
which undergoes photosynthesis, provides the fungus with food, while the fungus provides moisture for the
algae.
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Mistletoe is a plant that grows on other plants. It draws its foocl trom the plant on which it lives and
eventually leads to that plant's death.
IV. Termites are insects that eat wood. However, termites cannot digest the cellulose of the wood by
themselves. Inside the digestive system of the termite are tiny protozoa, single celled organisms, that are able tcr
digest the cellulose. By living inside the dige:stive system of the tehnite, the protozoan receives food, water ancl
protection.
V. Small fish live among the tentacles of sea anemones and appear to be immune to the anemone's stinging
cells' In this way, they seem to gain protection from the sea anemone and wind up with sorne of the foort that
the anemone is gathering for itself.
VI. There is a certain species of crocodile that allows a small bird, the Egyptian plover, to pick food particles
from its gums. While the plover is getting its food, the crocodile is having its teeth cleaned.
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ViI. Tapeworms live in the digestive tract of cercain animals. While there they are provitled with nutrients and
rn environment in which they can live and reproduce. However, the animals in whieh they
lived is harmed by
ihe loss of nutrients and the resulting tissue damage.
VIII' Bacteria that live in the human intestine use food that is dige.sterl
and moving through. In return, the
bacteria release certain vitamins that are used by the human.
IX. Athletes food fungus lives between the toes of humans; It thrives in warm, dark, and damp places.
Although they obtain nourishment by feeding on the tissue of the human, the human is harmei by the
relationship
X. Nitrogen-fixing bacteria live on the roots of certain legumes. The nitrates that are produced by the bacteria
are used by the plant. In retum, the bacteria gain food from the plant.
Xi' Barnacles atiach themselves to whales. They are carried by the whales to new feeding grounds. The whale
seems unaffected by the relationship.
XII'
Lice are organisms that can attach to the skin of other animals and draw fbod lrom the skin of these
organisrns. They are uncomfortable and can cause harm to the animal on which they live.