Course

Environmental Science

Study Pack

Set 9 Sustaining Biodiversity The Species Approach

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Question 1

(Multiple Choice)

Free
What percentage of the world's known plant species have been examined for medicinal properties?

A)0.5%
B)5%
C)10%
D)25%
E)33%

Answer

Question 2

(Multiple Choice)

Free
The estimate of the background extinction rate is thought to be too low. Which explanation for why the estimate may be low is false ?

A)The rate is likely to increase sharply in the next 50-100 years.
B)Current and projected extinction rates in biodiversity hotspots are higher than the global average.
C)Tropical forests, coral reefs, and wetlands are being fragmented and degraded.
D)Long-term species recovery is threatened by available areas such as tropical forest, coral reefs, and wetlands.
E)The growing human population is using fewer resources per person.

Answer

Question 3

(Multiple Choice)

Free
The key role of a honeybee is to ____ plants and flowers.

A)pollinate
B)populate
C)produce
D)protect
E)preserve

Answer