____1.Which of the Following Is a Pure Substance?

Biology Quiz #4

Multiple Choice

Identify the letter of the choice that best completes the statement or answers the question.

____1.Which of the following is a pure substance?

1) blood

2) the ocean

3) brass

4) wine

5) leather

a. / 1,3 / d. / 3,5
b. / 1,3,4 / e. / none of these
c. / 2,5

____2.Amphibians are completely dependent on an aquatic environment for

a. / respiration. / d. / motility.
b. / feeding. / e. / all of the above
c. / reproduction.

____3.Which of the following does not possess large amounts of yolk?

a. / bird egg
b. / snake egg
c. / mammalian egg
d. / turtle egg
e. / fish egg

____4.The biome with the greatest range of daily temperature extremes is the

a. / desert.
b. / grassland.
c. / tiaga.
d. / tropical rainforest.
e. / tundra.

____5.An interrelated network of organisms and the surrounding, non-living environment is called a(n)

a. / community / d. / population
b. / gene pool / e. / ecosystem
c. / niche

____6.The first plant community that forms on bare rocks often has species such as

a. / blueberry and balsam fir. / d. / paper birch and white spruce.
b. / crabgrass and ragweed. / e. / grasses and legumes.
c. / lichens and moss.

____7.Which of the following statements best describes the movements of energy and nutrients in ecosystems?

a. / Energy and nutrients flow through ecosystems.
b. / Energy and nutrients cycle in ecosystems.
c. / Energy flows through and nutrients cycle in ecosystems.
d. / Energy cycles in and nutrients flow through ecosystems.
e. / energy is lost from and nutrients cycle in ecosystems.

____8.In natural populations, exponential growth may be limited by several environmental factors. Which of the following is such a limiting factor?

1. insufficient food supply.

2. accumulation of waste products.

3. lack of nesting space

4. inadequate oxygen.

a. / 1, 4
b. / 2, 3, 4
c. / 3
d. / 1, 3, 4
e. / none of these

____9.Competition is most intense between

a. / members of different species.
b. / members of the same species.
c. / occupants of the same community.
d. / members of the opposite sex of the same species.
e. / the largest and the smallest organism.

____10.The amount of ultraviolet radiation that reaches the earth's surface is greatly decreased by ___ in the atmosphere.

a. / ozone
b. / oxygen gas
c. / water vapor
d. / carbon dioxide
e. / nitrogen gas

____11.Species A and species B are two commercially important marine fish. A eats photosynthetic algae, while B eats species A. When commercial fishermen pull in their nets, which heterotroph will make up the greater percentage of the catch?

a. / Species A
b. / Species B
c. / The catch will be 50% each.
d. / The photosynthetic algae
e. / Can't determine without knowing the organisms and where the catch is made.

____12.In a natural community, the primary consumers are

a. / herbivores.
b. / carnivores.
c. / scavengers.
d. / decomposers.
e. / autotrophs.

____13.In a forest ecosystem, the major consumers in the grazing food web are

a. / fungi
b. / deer and other moderately sized animals
c. / lumberjacks
d. / caterpillars
e. / none of these

____14.Competition is generally greatest between

a. / two different species of carnivores.
b. / two different species of herbivores.
c. / carnivores and herbivores.
d. / two species of the same genus.
e. / organisms that have similar life styles.

Biology Quiz #4

Answer Section

MULTIPLE CHOICE

1.E

2.C

3.C

4.A

5.E

6.C

7.A

8.E

9.B

10.A

11.A

12.A

13.D

14.A