Biodiversity Answers

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1
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How can an increase in biodiversity lead to an increase in ecosystem stability?

A
A more biodiverse ecosystem is not subject to change.
B
A more biodiverse ecosystem has a higher chance of adapting to species changes.
C
A more biodiverse ecosystem has fewer species types to balance.
D
A more biodiverse ecosystem is subject to fewer natural disasters.
2
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Ecosystems with greater biodiversity have an increased stability.

A
T
B
F
3

Which of the following statements about migration is true?

A
Migration is always from one region to another.
B
Animals always migrate within a region.
C
Migration always negatively impacts an ecosystem.
D
Animals migrate for various reasons.
4

Organisms are dependent on each other for the energy they need to survive. Photos (left to right) by Mehmet Karatay, Jens Buurgaard Nielsen, Furryscaly, and Walter Siegmund What would occur if the snake population is removed from the ecosystem pictured above?

Question illustration
A
the hawk population increases
B
the mouse population increases
C
the leaf population increases
D
the mouse population is not affected
5

Consider the following food chain: Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes. What is likely to happen if a new organism that feeds off mice is introduced?

A
The mice population will increase in response to the arrival of the new organism.
B
The mice population, grasshopper population, and plant population will all increase.
C
The new organism will compete with the snake population for resources.
D
The populations of the existing organisms will remain unaffected.
6

Consider the following food chain: Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes. What will happen to snakes in the long term if mice become extinct?

A
The number of snakes will increase temporarily, and then decrease.
B
The number of snakes will decrease permanently, but they will not die out completely.
C
The number of snakes will decrease temporarily and then increase.
D
Snakes will die out if they do not find an alternative food source.
7

A mutation that causes resistance in a population of beetles is an example of _______.

A
macroevolution
B
microevolution
C
migration
D
reproduction
8

What is a possible cause for a decrease in ecosystem productivity?

A
an increase in the biodiversity of the ecosystem
B
a decrease of the biodiversity of an ecosystem
C
the biodiversity of an ecosystem experiencing no change
D
an ecosystem becoming more stable
9

An increase in the biodiversity of an ecosystem leads to an increase in its productivity.

A
T
B
F
10

Which of the following is not a possible reason for migration?

A
climate changes
B
diminished food supply
C
reproduction patterns
D
increased biodiversity

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