Unit 9: Organisms an the Environment

Unit 9: Organisms an the Environment

7th Grade

20 Qs

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Unit 9: Organisms an the Environment

Unit 9: Organisms an the Environment

Assessment

Quiz

Science

7th Grade

Hard

Created by

54733 J

Used 29+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following situations contributes to the sustainability of an ecosystem?

Decrease in biodiversity

Increase in biodiversity

Removal of many populations of organisms

Extinction of a population from the ecosystem

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The diagrams above show an ecosystem during different stages of ecological succession.

In which order will these stages occur, from earliest to latest?

1, 2, 3, 4

4, 3, 2, 1

4, 2, 1, 3

1, 3, 4, 2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The more diverse an ecosystem is —

the more stable it is

the more similar the species will be

the fewer varieties of species are present

the more threatened its populations are

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

If you were studying vegetation and animal life around a small pond, you would expect to find a greater variety of organisms —

Area D

Area C

Area B

Area A

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?

Having more species in an ecosystem allows the human population to increase in size.

A variety of plant and animal species allows for more survivors of a natural disaster.

Fewer species in the ecosystem reduces the likelihood that disease spreads through the ecosystem

Low biodiversity reduces the competition for resources, which helps native species survive.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the plants described above would most likely be found in the rainforest?

leaves with dry tips, climbing vines and canopy covering

grows in clumps, hairy leaves, small

nonporous leaves, extended roots

absence of trees

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What effect does the increase in human population most likely have on the biodiversity of the plant species found in the rainforest?

As human population increases, the succession in the rainforest leads to increased biodiversity.

As human population increases, the diversity of all rainforest plant species decreases.

As human population increases, the number of individual rainforest plant species increases.

As human population increases, the diversity of larger rainforest plant species increases.

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