Definition Symbiosis A longterm interactive relationship between two different organisms Types There are 3 types of symbiosis commensalism mutualism and parasitism Commensalism ID: 777278
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Slide1
SYMBIOSIS
Your Subheading Here!
Slide2Definition
Symbiosis:
A
long-term
,
interactive
relationship between two different organisms.
Slide3Types
There are 3 types of symbiosis:
commensalism
,
mutualism
,
and
parasitism
.
Slide4Commensalism
an association between two organisms in which
one benefits
and
the other is neither
helped nor harmed
Slide5Mutualism
an association between two organisms in which
both benefit
Slide6Parasitism
an association between two organisms in which
one benefits
and
the other is harmed
Slide7What Type ?
Bees fly from flower to flower gathering nectar, which they make into food for their colonies. When they land in a flower, the bees get some pollen on their hairy bodies, and when they land in the next flower, some of the pollen from the first one rubs off, pollinating the plant, so it can reproduce.
M
Slide8What Type ?
Spider crabs live in shallow areas of the ocean floor, and greenish-brown algae lives on the crabs‘ backs, making the crabs blend in with their environment and unnoticeable to predators.
M
Slide9What Type?
The Arctic fox follows caribou while they forage for grasses. The caribou dig in the snow to get the grasses. Once a caribou digs up the soil, the Arctic fox comes and hunts some of the underground mammals that have come closer to the surface due to the digging action of the caribou.
C
Slide10What Type?
A certain kind of bacteria (bacteria = plural; bacterium = singular) live in the intestines of humans and other animals. A human’s digestive system cannot digest all of the food a person eats. So, bacteria in the intestines eat the food that the human cannot digest, and the bacteria partially digest it, allowing the human to finish the job.
M
Slide11What Type?
When horses, cows, and other livestock graze in fields, they tend to stir up and move many insects that have been resting on the grass. The cattle egret then catches the insects and eats them.
C
Slide12What Type?
Tapeworms are segmented flatworms that attach themselves to the insides of the intestines of animals such as cows, pigs, and even humans. They get food by eating the host's partially digested food, depriving the host of nutrients.
P
Slide13What Type?
Oxpecker birds perch on rhinos or zebras and eat ticks that live on their skin. The oxpeckers get food, and the beasts get pest control. Also, when there is danger, the oxpeckers fly upward and scream a warning the rhinos and zebras have learned to trust.
M
Slide14What Type?
Fleas find a host, such as dogs, and bite their skin, suck their blood, and cause them to itch. So, the fleas get food and a warm home, and the hosts get itchy skin and sometimes infections.
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Slide15What Type?
Remora sharks have an adhesive disk on their dorsal (back) surface that allows them to attach themselves to whales or other large marine animals. Once attached, the sharks feed on the remains, or uneaten scraps, from the other marine animal’s food.
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Slide16Review
What are two key characteristics in defining symbiosis?
Who benefits in mutualism?
What is commensalism?
What is the 3
rd
type of symbiosis?
Why isn’t there a type of symbiosis in which both organisms are harmed?
When a lion stalks a gazelle, catches it, and eats it, is that a type of symbiosis? Why or why not?
What type of symbiosis would best describe a teacher-student relationship? Why?
Slide17Review
ANSWERS
What are two key characteristics in defining symbiosis?
long-term & interactive
Who benefits in mutualism?
both benefit (it’s mutual!)
What is commensalism?
In commensalism, one participant benefits, and the other is unharmed.
What is the 3
rd
type of symbiosis?
parasitism
Slide18Review
ANSWERS
5. Why
isn’t there a type of symbiosis in which both
organisms
are harmed
?
All organisms learn from their mistakes, and they tend to avoid situations that might harm them.
6. A
lion stalks a gazelle, catches it, and eats
it. Does
that
scenario describe a symbiotic relationship? Why?
No, this is an example of
PREDATION
. It is not a type of symbiosis because the relationship is a SHORT-TERM one, not a long-term one.
7. What
type of symbiosis would best describe
a
teacher-student relationship? Why
?
Answers will vary, depending on perceptions!