This document discusses three types of relationships between organisms: predation, commensalism, and parasitism. Predation involves a predator capturing and eating a prey animal. Commensalism benefits both organisms, like birds eating insects off cows. Parasitism benefits one organism while harming the host, such as mosquitoes sucking blood and transmitting diseases to humans or ticks parasitizing dogs.

1. RELATIONSHIPS AMONG
ORGANISMS: PREDATION,
COMMENSALISM AND PARASITISM

2. 1. PREDATION: a predator captures,
kills and eats another animal, which is
the PREY

3. COMMENSALISM: both animals benefit
from this relationship. Birds eat insects
and cleans the cow.

4. SHARK AND REMORAS

5. 3. PARASITISM: one organism
benefits and harms the other. The
mosquito sucks blood and carries
diseases. The mosquito is the
parasite and the person is the host.

6. The tick is
the parasite
and the dog
is the host.

7. MISTLETOE IS A PARASITE.

8. INTESTINAL WORMS ARE PARASITES.
THE HOSTS ARE PEOPLE OR ANIMALS.