WorksheetsBiodiversity Env. Ch. 10
Total questions: 25
Worksheet time: 50mins
Name
Class
Date
1.
A species in danger of extinction is called:
a)
Threatened
b)
Endangered
c)
Extinct
d)
Exotic
2.
How many species are estimated to be living on Earth?
a)
1-2 million
b)
10-50 million
c)
5-10 million
d)
50-100 million
3.
Which of the following would be most effective in slowing the loss of biodiversity?
a)
every country must maintain a seed bank
b)
setting aside small plots of land
c)
creating parks or preserves
d)
freezing fertilized eggs
4.
In what part of the world are the greatest number of extinctions occurring?
a)
mountains
b)
pine forests
c)
great plains
d)
tropical rainforests
5.
Which country has the strongest laws to protect endangered species?
a)
US
b)
Germany
c)
England
d)
China
6.
what percentage of species have become or are expected to become extinct between 1900 and 2100?
a)
1%
b)
10%
c)
25%
d)
75%
7.
The fact that organisms are adapted to survive in particular environments helps to explain why
a)
compromise is impossible on environmental issues.
b)
captive-breeding programs are often ineffective
c)
habitat destruction accounts for most extinctions.
d)
non-native plant species never flourish in new areas
8.
The number and variety of species on Earth is called ____________________.
a)
biodiversity
b)
keystone
c)
exotic
d)
none of these
9.
The level of biodiversity that involves a variety of habits and communities is
a)
population diversity
b)
genetic diversity
c)
species diversity
d)
ecosystem diversity
10.
Biodiversity important to ecosystems because
a)
It increases at each level of the food chain.
b)
It helps populations adapt to ecological changes
c)
It allows animals to feed permanently from one type of plant
d)
It reduces the number of insects in a given ecosystem
11.
The major human causes of extinction today are
a)
poaching
b)
destroying habitats
c)
polluting
d)
all of these are major causes
12.
Which areas of the United States represent ecosystems with high levels of biodiversity?
a)
Florida Everglades
b)
Colorado Rockies
c)
Missouri hardwood forests
d)
Oregon swamps
13.
Where are many critical biodiversity hotspots located?
a)
tropical islands
b)
cities & developed areas
c)
deserts
d)
polar areas
14.
A(n) ____________________ is any species that is essential to the health of an ecosystem.
a)
biodiversity
b)
endangered
c)
exotic
d)
keystone
15.
Any species with a declining population that could become endangered is called _____________.
a)
extinct
b)
threatened
c)
exotic
d)
keystone
16.
Something designed to protect one or more species in a tract of land is known as a(n)___ plan.
a)
habitat conservation
b)
conservation area
c)
habitat
d)
all of these
17.
A(n) ___________ is a segment of DNA that codes for a specific trait.
a)
chromosome
b)
gene
c)
allele
d)
nucleus
18.
A(n) __________ is any species likely to become extinct if it is not protected.
a)
exotic
b)
extinct
c)
endangered
d)
threatened
19.
The death of many species in a relatively short time is known as ________ extinction.
a)
endangered
b)
complete
c)
mass
d)
threatened
20.
A(n) ______________ is an organism that is not native to a particular region.
a)
exotic
b)
endangered
c)
threatened
d)
extinct
21.
A(n) ____________ species is an organism that is critical to an ecosystem’s functioning.
a)
exotic
b)
keystone
c)
threatened
d)
endangered
22.
Diversity that is represented by different genes found in a population is called_______.
a)
population
b)
species
c)
DNA
d)
genetic
23.
The sources of many antibiotics are in chemicals produced by ______________
a)
fungi
b)
bacteria
c)
protozoans
d)
plants
24.
A crop produced by combining genetic materials is called a ___________.
a)
purebred
b)
hybrid
c)
food
d)
none of these
25.
The Amazon rain forest is a habitat with a high species variability known as a(n) a _______
a)
keystone
b)
endemic
c)
all of these
d)
biodiversity hotspot
100 %
