Transcript 3 main types of relationships

Species
Interaction
Symbiosis
Symbiosis
• Means “living together”
• Interaction between two species where at
least one benefits
– Some organisms are permanently dependent on
others for survival
• Three types
– Mutualism
– Commensalism
– Parasitism
Mutualism
• Both species benefit
– Example: Humming
bird and flower
• Hummingbird gets
food and flower gets
pollinated
Commensalism
• One species benefits
and the other is not
helped nor is it harmed
– Example: Remora on a
shark.
Parasitism
• One organism living in
or on another organism
and causes harm
– Parasite: organism that
benefits
– Host: organism that is
harmed
– Example: fleas on dogs
Symbiosis Practice
Which type of symbiosis is it?
Commensalism
• Remora Fish and Shark
– Remora fish attaches
itself to the underside of
shark without harming
the shark
– Remora eats leftover
bits of food from the
sharks meals
– Remora also gets
protection from
predators
Parasitism
• Mistletoe and trees
– Mistletoe grows on
trees like Palo Verde
– Mistletoe takes
nutrients from trees
• Causes harm to Palo
Verde
Host: Trees (Palo Verde)
Parasite: Mistletoe
Mutualism
• Cow and bacteria
– Bacterial live in cow’s
stomach and helps
breakdown plant
matter
Symbiosis = Adaptation?
• Adaptation is a behavior or physical
characteristic that helps an organism
survives.
• How does symbiosis help organisms survive?
– Gives advantage
• Protection from predators
• Easier access to food
Symbiosis is
a lifesaver