INTERACTIONS BETWEEN
LIVING ORGANISMS
By
Mohd Hanafiah B Said
( PARASITISM )
1. Relationship
involving two organisms, the parasite and the host.
2. The parasite, eg.
ticks, fleas, mosquitos, leeches and roundworms live and suck theblood of the
host eg. dogs, people and other animals.
3. The removal of blood
brings harm to the animals and people,
4. Bacteria causing
cholera and tuberculosis are parasites that harm our body.
5. Bracket fungi -
parasites that draw water and minerals from the tree they live on.
6. The Rafflesia plant
in southeast Asia, is a parasite, growing on and absorbing food from the roots
of woody plants.
PARASITISM
Relationship between the parasite and
the host.
Parasite benefits but the host is harmed.
COMMENSALISM
TO SHOW INTERACTION BETWEEN
ORGANISMS
1. Remora fish and shark
Commensalism is the relationship in
which the remora fish attaches itself to a
shark and feeds on food scattered by the shark. The shark
neither benefits from the
remora fish nor is harmed by it.
Relationship
between two kinds of organisms in which one benefits while the other
neither
benefits nor is harmed by it.
MUTUALISM ( SYMBIOSIS )
Interaction between two different organisms that live together
and both organisms benefit from each other.
TO EVALUATE INTERACTIONS OF
ORGANISMS
IN MUTUALISM ( SYMBIOSIS )
Rhizobium and the pea plant
Rhizobium bacteria in the
nodules of the roots of the pea plant converts atmospheric
nitrogen into nitrates and
supplies it to the pea plant. The pea plant supplies the rhizobium bacteria with sugar for
energy.
Fungus
and algae
A lichen, a combination
of an alga and a fungus living together. The alga provides the
fungus with food by
photosynthesis while the fungus provides support by making
materials needed by the alga
Clown
fish and sea anemone
The sea anemone provides
shelter and protection for the clown fish. The clown fish brings food and lures larger fish to its stinging
tentacles
