AnswersFL-2001340-Environmental Science BHuman Impact on the Environment

Human Impact on the Environment — Cumulative exam Answers

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26

A microgram of skin cells.

Question illustration
A
cell
B
tissue
C
organ
D
organ system
27

Pandas eat bamboo for energy. What are pandas?

A
producers
B
consumers
C
decomposers
D
autotrophs
28

Which describes the primary function of the nervous system in keeping the body in homeostasis?

A
It processes the environment and sends out signals.
B
It controls movement and provides structure.
C
It physically breaks down and absorbs food.
D
It puts oxygen in the blood, which is essential for life.
29

Smallpox is a virus that causes a rash that then turns into painful blisters. The last known case of smallpox was in 1977. What is the best explanation for the eradication of smallpox?

A
People are exercising more than they used to.
B
Genetic testing determines who is more prone to smallpox.
C
There was an increase in antibacterial products.
D
An effective vaccine was developed.
30

Male peacocks have large colorful tails that they spread in a fan shape to attract females during courtship. Peahens (female peacocks) are more likely to mate with males that have larger and more colorful tails. As a result, few peacocks have tails with dull coloring.Which concept is demonstrated by a decrease in dull coloring?

Question illustration
A
speciation
B
biodiversity
C
natural selection
D
variation
31

Which best describes the exocrine glands?

A
Exocrine glands function only for digestion and temperature regulation.
B
Exocrine glands can sometimes release substances out of the body.
C
Exocrine glands secrete substances into the bloodstream.
D
Exocrine glands are only found in the skin and mouth.
32

Which of these can be found in both gymnosperms and angiosperms?

A
vascular tissue and exposed seeds
B
vascular tissue and seeds
C
flowers and vascular tissue
D
enclosed seeds and flowers
33

Which is an advantage of flowering plants?

A
Flowers attract insects that transport gametes.
B
Flowers give greater access to sunlight.
C
Flowers help transport water and nutrients.
D
Flowers assist plants that live in the water.
34

Which of the following examples can cause gene flow between populations?

A
an increase in predators to a population of zebra
B
a volcanic eruption that kills half of a population of mice
C
bird droppings that contain seeds from a different location
D
a person that sprays a toxin on a group of mosquitoes
35

Hyenas and lions have fierce battles over food. Which type of relationship does this describe?

A
parasitism
B
commensalism
C
predation
D
competition
36

What is the function of the hormone progesterone?

A
preparation of the body for maintaining pregnancy
B
development of male secondary sex characteristics
C
development of female secondary sex characteristics
D
preparation of the fallopian tube for fertilization
37

A farmer has applied a pesticide to control a pest population that is affecting her crops. The pest population has reacted as shown below.Which best describes the process that the pest population has experienced due to this environmental change?

Question illustration
A
genetic diversity
B
natural selection
C
natural resistance
D
gene flow
38

Which is most likely a source of air pollution?

A
littering
B
CFCs
C
oil spill
D
runoff
39

Which is a requirement for natural selection to occur?

A
heritable variations for some traits
B
the ability of an organism to improve a trait during its lifetime
C
equal probability of survival for all offspring
D
fewer offspring than the environment can support
40

If the data below were put into a bar graph, which animal would have the lowest bar on the bar graph?Number of Individuals in a Rocky Mountain Forest OrganismPopulationMountain lions150Bobcats300Coyotes10,000Deer25,000

A
mountain lions
B
bobcats
C
coyotes
D
deer

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