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Chapter 16 Quiz 2
Final Practice
20
Biology
Undergraduate 2
05/09/2011

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Term
By fumigating several islands in the Florida Keys with methyl bromide, scientists demonstrated that:
Definition
the rate of immigration of new species and extinction of species on an island is a function of island size and distance from the mainland.
Term
A habitat with ____________________ disturbance is expected to have the greatest species richness.
Definition
an intermediate amount of
Term
How many species do biologists estimate to be currently on Earth?
Definition
between five million and one hundred million
Term
Classifying animals as endangered or threatened:
Definition
is b) and c) only.
Term
Ozone is a molecule with a the chemical formula:
Definition
O3
Term
What does is mean to say a species is a “threatened” species?
Definition
That species is not in immediate danger of extinction but is likely to be so in the near future.
Term
Conservation biologists employ the methods and knowledge derived from which of these other fields of biology?
Definition
all of the above
Term
The first species of plants to grow in after a farm field is abandoned are often:
Definition
weeds.
Term
An urban planner wants to build some new homes in a woodland area but wants to do so in a manner that is the least disruptive to its natural biodiversity levels. Which of the following choices is his best mode of action?
Definition
To build all the homes on one side of the forest leaving the majority of the forest intact and grouped together.
Term
Which of the following is NOT a troublesome exotic species?
Definition
the common milkweed in the United States
Term
Which of the following is NOT an indicator of increased extinction threat for a species?
Definition
high genetic diversity
Term
Biodiversity hotspots are defined by which two criteria?
Definition
number of endemic species and degree of threat
Term
Which of the following is NOT a correct statement about the zebra mussel in North America?
Definition
They have a negative impact on all of the native species in the lakes and rivers they inhabit.
Term
Species particularly vulnerable to extinction include:
Definition
all of the above.
Term
Which of the following is NOT an important greenhouse gas?
Definition
sulfur dioxide, SO2
Term
According to the theory of island biogeography, which of the following islands should have the highest number of species at equilibrium?
Definition
a large island near the continent
Term
What bird, once the most abundant in North America, was hunted to extinction by means of shooting and trapping during the most of the 1800s?
Definition
passenger pigeon
Term
Biodiversity _________________ have been identified based on high biodiversity and imminent threats caused by human activities.
Definition
hotspots
Term
One reason there is more species diversity in the tropics is:
Definition
there is more solar energy available in the tropics than in the temperate zones.
Term
In conservative biology, the concept of area effect states that:
Definition
Both answers a) and c) are correct.
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