Changes in Ecosystems and Relationships

Some damaged ecosystems can recover after a disturbance. Is this statement true or false?

• True

• False

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

____________________ is the number and variety of species that are present in an area.

• Secondary succession

• Primary succession

• Biodiversity

• Ecosystems

Tags

NGSS.MS-LS2-5

When a community starts to grow in an area that has no soil, this is known as ____________ succession.

• Secondary

• Primary

The slow development or replacement of an ecological community by another ecological community over time is called ______________________.

• Succession

• Biodiversity

• Development

• Climax species

What is it called when changes occur in an ecosystem that already exists?

• primary succession

• secondary succession

• conservation

• pollution

Tags

NGSS.MS-LS2-4

In which type of symbiotic relationship do both species benefit (+,+) ?

• Commensalism

• Parasitism

• Mutualism

• Predation

In which type of symbiotic relationship does one species benefit while the other species is not affected (+, 0)?

• Commensalism

• Parasitism

• Mutualism

• Predation

In which type of symbiotic relationship does one species benefit while the other species is harmed (+,-)?

• Commensalism

• Parasitism

• Mutualism

• Predation

Yucca flowers are pollinated by yucca moths. The moths lay their eggs  in the flowers where  the larvae hatch and eat some of the developing seeds. Both species benefit.  

• Mutualism 
• Parasitism 
• Commensalism 

Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism