Unit 7 test Review Changes in Marine Ecosystem

What is the correct order in this pond succession? (YOUNGEST to OLDEST)

• A, B, C, D

• D, C, B, A

• B, A, D, C

• C, D, A, B

Which of these is an example of a climax community?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-4

Reaches a climax community quicker because soil is already present

• primary succession

• secondary succession

• both types of succession

How would the biodiversity of this ecosystem be affected if the lantern fish disappeared?

• The ocean sunfish population would increase.

• The large shark population would die out.

• The squid would die out.

• There would be no change.

Invasive species alter the ecosystem by a___________in number quickly,this leads to _____ food for the native  species. 

• increasing  less
• decline  decreasing

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Invasive species grow quickly due to the lack of predators, this leads to a decline or extinction of the native population. True or false? 

• false
• true

Tags

NGSS.MS-LS2-4

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

Tags

NGSS.HS-LS2-1

NGSS.HS-LS4-5

Does every species have the means to become invasive? 

• Depends on the abiotic factors
• es, if the food web can support another organism
• Yes, if they are determined enough
• No, only species that pose a threat to ecosystem

compare primary and secondary succession. What is the distinction between them?

• Primary succession is the sequence of species that become established early in a newly colonized area and secondary succession is the sequence of species that move in later.

• Primary succession is the establishment of a community in an area with no soil while secondary succession is the establishment of a new community in an existing ecosystem that was disturbed.

• Primary succession is the establishment of a new community in an existing ecosystem that was once disturbed, while secondary succession is an establishment of a community in an area with no soil.

• Primary succession is a sequence of plants that colonize in a new area while secondary succession is the sequence of animals that move in later.

A ____________ plant species is one that came from one area to another area due to human action.

• Weed

• Native

• Invasive

• None of the above