Ecosystem Dynamics

A relationship between two organisms in which one organism benefits and the other is unharmed...

• Mutualism 
• Competition
• Parasitsm 
• Commensalism 

Remoras attach themselves to a shark's body. They then travel with the shark and feed on the left-over scraps from the shark's meals. What kind of relationship is this?

• commensalism
• mutualism
• predation
• competition

Tags

NGSS.MS-LS2-2

Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower. What type of symbiosis is this?

• commensalism
• mutualism
• parasitism
• predation

Tags

NGSS.MS-LS2-2

What is the term for a species that plays a critical role in the maintaining the structure and health of an ecosystem?

• keystone species

• invasive species

• engineer

• predator

Tags

NGSS.MS-LS2-2

Select the best definition for the term 'ecological niche'

• The physical space where a species lives

• Where the organism is in the food web

• the species relationship to other species

• A summation of the species' role in the ecosystem and its habitat

Where an organism lives

• habitat
• niche 
• heterotrogh
• biosphere

A habitat is the same as an ecological niche

• True

• False

A keystone species fills a unique ecological niche and therefore carries unique functions in an ecosystem

• True

• False

Tags

NGSS.MS-LS2-4

Which of the following is an abiotic factor?

• leaves
• soil
• grass
• animals

Tags

NGSS.MS-LS2-3

What is a habitat?

• The natural home or environment of an animal, plant, or other organism.

• The interrelationship of a species with all the biotic and abiotic factors affecting it.

• A biological community of interacting organisms and their physical environment.

• The natural home or environment of non-living organisms.