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Interactions Among Living Things

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Interactions Among Living Things A 7th Grade science presentation Interactions There are three major interactions among organisms: Competition Predation Symbiosis ... – PowerPoint PPT presentation

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Title: Interactions Among Living Things


1
Interactions Among Living Things
  • A 7th Grade science presentation

2
Interactions
  • There are three major interactions among
    organisms
  • Competition
  • Predation
  • Symbiosis

3
Predation
  • Predation is an interaction in which one organism
    kills and eats another organism.
  • The organism that does the killing is the
    predator.
  • The organism that is killed is the prey.
  • Predation can have a major effect on the size of
    a population.

4
Competition
  • Competition is the struggle between organisms to
    survive in a habitat with limited resources.

5
Symbiosis
  • Symbiosis is a close relationship between two
    species that benefits at least one of the species
  • There are three types of symbiotic relationships
  • Mutualism
  • Commensalism
  • Parasitism

6
Mutualism
  • mutualism is an interaction between two or more
    species where both species derive benefit.
  • Ant-aphid mutualism the aphids are protected
    from predators by the ants. The ants get the
    aphid secretion of honeydew as a reward.

7
Commensalism
  • Commensalismis a relationship in which one
    species benefits and the other species is neither
    helped nor harmed.
  • The Remora fish (Echeneidea) is a long slender
    fish which has its dorsal fin modified as a
    sucker-like attachment organ. It attaches to the
    sides of larger fish and turtles using them as
    transport hosts but in addition, obtains food
    fragments dropped from the host.

8

Parasitism
  • An organism living on or inside another organism
    and harming it.
  • Head lice
  • Ticks
  • Fleas
  • Heart worm

9
Tape Worm
10
Athletes foot
11
Ring worm
12
Parasitism
  • The organism that benefits is called a parasite.
  • The organisms that it lives on or in is called a
    host.

13
Thank you
  • For paying attention and taking notes.
  • This concludes the slide show.
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