How do lichens contribute to primary succession?

Lichens begin to break down rock to form soil

Lichens decompose organic matter from animals and plants

Lichens are nitrogen fixing bacteria

Lichens convert carbohydrates into fossil fuels.

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

Lichens → Grasses → Shrubs → Trees

Lichens → Shrubs → Grasses → Trees

Lichens → tree → shrubs→Grasses

Grasses → Lichens → Shrubs → Trees

storage area for cells; water storage in plants

They actually do not have an important role

Which adaptation (for the underlined animal) serves the function of defense?

A porcupine’s quills cause a predator to seek another meal.

A walking stick looks like the twig on which it rests.

A whale filters plankton and krill from the water in which it swims.

A penguin is dark on top and white below to blend in with the water.

Which of the following is a physical adaptation for the underlined animal?

A butterfly has bright colors to warn predators that it is poisonous.

A hognose snake rolls over, slows its breathing, and hangs its tongue out to play dead.

A herd of buffalo encircle their young to protect them from a pack of wolves.

A dung beetle rolls a piece of dung across the desert.

Image "B" shows more biodiversity than image "A". Why?

Because "B" shows more different species than image "A"

Because image "B" has less different species than "A"

"A" has a greater number of same species plants so this statement is wrong.

Both images show the same biodiversity

Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".

If one organism is removed the food web can still operate (work) with little or no negative effect.

If an organism is removed the food web will collapse and will affect the environment.

Food Web B is an example of...

Low biodiversity and low sustainability. If the producer dies then all the food web will suffer.

High biodiversity and high sustainability. If an organism is removed the food web will continue with no effect.

Organisms

Authored by Charles Martinez

Biology

8th Grade

NGSS covered

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36 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The living organisms in an ecosystem such as plants and animals

adaptation

biotic

decomposer

abiotic

Tags

NGSS.MS-LS2-3

NGSS.MS-LS4-4

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The non-living factors in an ecosystem such as rocks, water and temperature.

natural selection

biotic

biodiversity

abiotic

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organisms that make their own food. Also called autotrophs.

Producer

Parasite

Scavenger

Decomposer

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Organisms that eat other organisms (heterotroph).

Producer

Parasite

Consumer

Scavenger

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Organisms that digest dead producers and consumers such as mold, fungus, bacteria and worms.

Producer

Parasite

Decomposer

Consumer

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organisms, such as vultures, that feed on dead animals.

Producer

Scavenger

Consumer

Parasite

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Organisms that live in or on another organism and benefit at the host's expense.

Parasite

Producer

Scavenger

Decomposer

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Organisms

The living organisms in an ecosystem such as plants and animals

The non-living factors in an ecosystem such as rocks, water and temperature.

Organisms that make their own food. Also called autotrophs.

Organisms that eat other organisms (heterotroph).

Organisms that digest dead producers and consumers such as mold, fungus, bacteria and worms.

Organisms, such as vultures, that feed on dead animals.

Organisms that live in or on another organism and benefit at the host's expense.

Struggle between organisms of the same or different species for food, space, light, water, etc.

Process by which an animal or plant species becomes fitted to its environment to help them survive.

Photosynthetic plant that is the beginning of the food chain for many aquatic animals.

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