Ecosystems

Bird & Tree: A bird builds a nest in a hole in the trunk of the tree. It is protected from the rain and predators. The tree is not harmed or helped by the bird.

• Mutualism

• Commensalism

• Parasitism

• Competition

Starfish are probably the most important predator in the shallow ecosystem because they eat basically anything that they can come across. Their feeding activities control the whole ecosystem. This is an example of the starfish ___.

• habitat
• biotic factors
• tolerance level
• niche

Tags

NGSS.MS-LS2-2

All the different populations that live together in an area make up a(n)

• community.
• ecosystem.
• organism.
• species.

All of the following statements concerning characteristics of predator-prey relationship are correct EXCEPT:

• Camouflage is an adaptation that protects prey.
• A rise in the population of predators is followed by a decreased in the population of prey.
• A rise in the population of prey is often followed by a rise in the population of predators.
• The population of predators most often eliminates the population of prey

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A key stone species is...

• the top carnivore.
• has the largest population.
• has the most specialized niche.
• determines numbers and types of other species.

Tags

NGSS.MS-LS2-4

What is the name given to lichen or algae after a primary succession?

• pioneer species
• volunteer species
• founder species
• conqueror species

Tags

NGSS.MS-LS2-3

a system made up of organisms interacting with one another and with the nonliving parts of the system

• biotic factors

• ecosystem

• ecology

• abiotic factors

• biosphere

Tags

NGSS.MS-LS2-3

the part of the earth where organisms can live

• biotic factors

• ecosystem

• ecology

• abiotic factors

• biosphere

the study of the interactions in an ecosystem

• biotic factors

• ecosystem

• ecology

• abiotic factors

• bioshpere

Tags

NGSS.MS-LS2-2

Which of the following is a biotic factor in an ecosystem?

• soil

• water

• bacteria

• sunlight