Relationships in Nature

When a symbiotic relationship benefits both organisms, it is an example of:

• Commensalism

• Mutualism

• Parasitism

How does a crocodile benefit from a bird eating from its mouth?

• It gets its teeth clean

• It gets to eat the bird

• It gets a defense against flies

How do people benefit from bacteria in their intestines?

• The bacteria prevents humans from getting sick.

• The bacteria allows humans to eat a wider variety of foods

• The bacteria allows humans to go longer without eating

When a symbiotic relationship helps one organism and hurts the other it is an example of:

• Commensalism

• Mutualism

• Parasitism

The harmed species in a parasitic relationship is called:

• The occupant

• The parasite

• The host

The following picture is an example of what kind of symbiotic relationship?

• Commensalism

• Mutualism

• Parasitism

Leeches have been used for medicinal purposes. The leech benefits by getting blood (food) from humans. How do humans benefit from the mutualistic relationship?

• The leech helps improve blood flow in the human

• The leech reduces the humans chance of a bacterial infection

• The leech improves the cosmetic look of the human,

Predation means:

• Living on or in another organism at that organisms expense

• consuming another organism

• getting a benefit from another organism without harming or helping it

• getting a benefit from another organism while helping it

• belonging in the same niche with limited resources

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Parasitism means:

• Living on or in another organism at that organisms expense

• consuming another organism

• getting a benefit from another organism without harming or helping it

• getting a benefit from another organism while helping it

• belonging in the same niche with limited resources

Commensalism means:

• Living on or in another organism at that organisms expense

• consuming another organism

• getting a benefit from another organism without harming or helping it

• getting a benefit from another organism while helping it

• belonging in the same niche with limited resources