Ecological Succession: Mastery Test

A forest was completely destroyed by a volcanic eruption. All living organisms were killed. Then, due to the arrival of propagules carried by birds from nearby areas, certain plant species started growing in the forest. These species have started colonizing the forest because they could survive the harsh conditions of the forest. They also facilitated the growth of other species.

What stage of succession is taking place in the forest?

• competition

• nudation

• ecesis

• reaction

Tags

NGSS.MS-LS2-4

Beavers kill trees by cutting them down. They then use these trees to dam streams. They also help in creating ponds. This increases the biodiversity of the place because it modifies the distribution and population of many plants and animals.

Which type of species are beavers?

• predators

• prey

• engineers

• mutualists

In a certain ecosystem, the number of cheetahs is lower as compared to their prey, gazelles. If the cheetahs disappeared from this ecosystem, then the number of gazelles will increase. This will disrupt the ecosystem of the forest because the gazelles will compete for limited food resources and possibly exhaust them.

In this scenario, what type of species are cheetahs?

• pioneer

• seral

• climax

• keystone

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A few months ago, there was a wildfire in a forest. Only a few plants and animals survived the fire. Currently, many trees that existed before the fire have started growing again.

What type of succession has occurred in this forest?

• secondary

• artificial

• temporary

• primary

Which succession occurs in a community that was never colonized before?

• secondary

• artificial

• temporary

• primary

Type the correct answer in the box. Spell all words correctly.

During which succession do new species move into an area and colonize it?

During _______________ succession, new species move into an area and colonize it.

Type the correct answer in the box. Spell all words correctly.

Which type of succession do the biotic components of a community cause?

The biotic components of a community alter it to cause _______________ succession.

Type the correct answer in the box. Spell all words correctly.

A volcano erupted on an island. The entire plant community was destroyed and the island was covered with grey ash. Slowly, lichens and mosses started growing on the island. They helped in the process of soil formation and later other plants started growing too.

Lichens and mosses are ___________________ species.

Type the correct answer in the box. Spell all words correctly.

Which communities do early colonizers form?

Early colonizers result in the formation of _______________ communities.

What is the order of succession shown in this figure?

• A, B, C, D
• B, A, D, C
• C, D, A, B
• D, A, B, C

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS1-4