Interactions Among Living Things

What is parasitism?

• One organism benefits and the other is harmed

• Both organisms benefit

• One organism benefits and the other is neither helped nor harmed

• Both organisms are harmed

Tags

NGSS.MS-LS2-4

What is mutualism?

• One organism benefits and the other is harmed

• One organism benefits and the other is neither helped nor harmed

• Both organisms are harmed

• Both organisms benefit

What is commensalism?

• Both organisms benefit

• One organism benefits and the other is harmed

• One organism benefits and the other is neither helped nor harmed

• Both organisms are harmed

Why do ecological relationships matter?

• They have no impact on populations

• They are not important

• They can make significant impacts on populations

• They only affect one species

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Match the following

• Bacteria in our gut that helps us digest food

• Symbiosis

• A lion and a hyena pack fight over a fresh kill.

• Competition

• An anteater consuming the ants in an anthill

• Predator-Pray

Tags

NGSS.MS-LS2-2

In mutualism, both species ​ (a)   , whereas in competition both species are ​ (b)   . Competition often leads to the evolution of new ​ (c)   .

• benefit
• harmed
• traits
• colors

Tags

NGSS.MS-LS2-2

12.A

The ocean sunfish is a large, flat fish that spends most of its time in deep water feeding mainly on jellyfish. Sunfish often have many species of copepods, small crustaceans that bury their heads into the soft tissue of the sunfish. Sunfish will swim to the surface of the water and lie sideways allowing seabirds to eat the copepods from their skin. Match the organism to the correct description of how each organism is related to the sunfish.

• Mutualism

• Copepods

• Predation

• Jellyfish

• Parasitism

• Seabirds

Tags

NGSS.MS-LS2-2

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12.A

In some coral reefs, a relationship exists between pygmy seahorses and sea fans. The pygmy seahorse wraps its tail around the branches of the sea fan, which offers camouflage for the seahorse. The pygmy seahorse does not harm or benefit the sea fern while it grasps the branches with its tail. What is the correct classification of this relationship?​ (a)  

• Commensalism
• parasitism
• mutualism
• predator/ prey

Tags

NGSS.MS-LS2-2

Match the following types of relationships to their descriptions:

• Competition

• Both organisms are harmed by fighting over a resource

• Mutualism

• One organism benefits at the expense of the other

• Parasitism

• Both organisms benefit (help each other)

• Commensalism

• One organism benefits while the other remains neutral

Match the following

• commensalism

• Mutualism

• Give an example of a population found in an African Savanna.

• Elephant

• Give an example of a community found in the microbiome.  What about in the African Savanna?

• Elephant, giraffe, lions, grass

• What are three types of symbiosis?

• What type of symbiotic relationship involves one species benefiting and one species being neither helped nor harmed?

• What type of symbiotic relationship involves both species benefiting?

• Mutualism, commensalism, parasitism