Online Study Guide Instructions 1) You
do not need to type in your name in the space in the top-left area above. The results of this study
guide will not be sent to your teacher. 2) Carefully read each question and all the answer
choices. 3) Select the correct letter from the drop-down feature to the left of each
question. 4) When you are finished, click the “Check Your Work” button in the
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you the results. Note that the correct answer will be displayed beneath the questions. 6)
Keep doing the study guide over until you earn a 100 on it.
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1.
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Sometimes laws are
passed to protect certain areas in order to maintain biodiversity. This helps preserve the unique
characteristics of the organisms that live there. Sometimes land is preserved in several smaller
patches that are spread out
instead of one large area.
Which types of organisms will most likely become endangered if land
preserves are spread out in patches?
a. | organisms that hibernate in
winter | b. | organisms that need a lot of space to graze | c. | organisms that are able to fly great distances
| d. | organisms that burrow
underground |
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2.
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Humans harvest plants and animals from various
biomes. Three of these biomes are displayed below.
Marine Biome | Grassland Biome | Freshwater
Biome | | | | | | |
Which choice below correctly
describes one historical example of a decrease in biodiversity due to over-harvesting a plant or
animal in the United States?
a. | The hunting and harvesting of Blue Whales was banned in
1966, and this preservation effort led mainly by conservationist from the United States saved this
species from extinction.. | b. | In 1995 wolf packs
were re-introduced to the Yellowstone National Park in Wyoming in order to restore the natural food
web and to increase the overall biodiversity there. | c. | Farmers routinely plant and harvest crops such as corn in order to provide
food for people and livestock. | d. | In the 1800s
excessive hunting nearly caused the Buffalo (Bison) to go extinct. This significantly altered the
grassland ecosystem of the Great Plains region. |
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3.
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There are many worthwhile reasons to maintain and
promote biodiversity in the various biomes on planet Earth.
Six Types of
Biomes | (1) Grassland Biome | (2) Forest Biome | (3) Freshwater
Biome | (4) Marine Biome | (5) Tundra Biome | (6) Desert Biome | |
Select the option below that correctly describes two valid reasons for
maintaining biodiversity.
a. | Reducing biodiversity from rainforests helps humans by
eliminating dangerous plants and animals that might harm us. Additionally we can use the trees for
lumber to build homes. | b. | Maintaining
biodiversity in a zoo helps attract more customers which brings in additional tax revenue to the
local community, and it provide jobs to local citizens that work there. | c. | 1st Reason: When humans cause plants to go extinct, we are reducing our
potential food sources 2nd Reason: Maintaining biodiversity in
the oceans is important to the economies of many coastal cites due to various types of commercial
fishing. | d. | Reason 1: Many pharmaceuticals come from plants,
so greater plant biodiversity can provide us more types of drugs to fight illnesses. Reason 2: Trees and other plants improve the air quality by absorbing
carbon dioxide and releasing oxygen |
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4.
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Fertilizers containing
phosphorous and nitrogen are leached into a pond. The nutrients from the fertilizer cause algae
colonies in the pond to grow rapidly. As large quantities of algae die, the pond water becomes
depleted of oxygen.
What most likely will be the effect on the organisms that live in
this pond due to this algae growth?
a. | The depth of the pond will
increase. | b. | There will be less biodiversity in the pond. | c. | The water will become more
clear. | d. | A greater number of organisms will live in the
pond. |
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5.
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Human activities such as road building and home
construction often destroy wildlife habitats. For example, the clear-cutting of forests due to
urban development will most likely result in...?
a. | increased organism diversity. | c. | decreased forest biodiversity. | b. | decreased urban populations. | d. | increased oxygen
production. |
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6.
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About 78 million acres of trees in the Amazon
jungle are cut down each year. That is more than 150 acres lost every minute of every day which
results in a tremendous loss of biodiversity. These huge forests absorb millions of tons of
carbon-dioxide from the atmosphere and release millions of tons of oxygen. What is one
significant negative consequence of this deforestation?
a. | The amount of farm land in Brazil will be
increased. | b. | Biodiversity in
the Amazon rain forest will be increased. | c. | The amount of
oxygen in the atmosphere will be reduced. | d. | There will be more
plants to use as medicine from this region. |
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7.
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When ocean temperatures, salt levels, and nutrients
reach certain levels, it causes a type of red-colored algae to spread across the surface of the
water. This is known as a red tide. During a red tide, these algae reproduce very rapidly and consume
most of the nutrients in the water.
What would most likely be a consequence
of a red tide bloom along the coast of California?
a. | The water will become more
clear and less salty. | b. | Sea kelp will reproduce more rapidly in that part of the
ocean. | c. | A greater number of species will live in the
ocean | d. | The biodiversity in that part of the ocean will
decrease. |
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8.
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Human activities can alter ecosystems and result in
the extinction of species. Which action described below IS NOT an example of an
activity that would reduce biodiversity.
a. | Assuring that habitats are protected and remain
unaltered as much as possible | b. | Releasing a
non-native species into a fragile ecosystem like a wetland area | c. | Excessive hunting of wolves, bears, and mountain
lions | d. | Disrupting food webs by pouring toxic compounds into
rivers and lakes (water pollution) |
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9.
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The environmental conditions in the Arctic Circle
are challenging, and the food chains and food webs there are very fragile. Which statement
describes a possible consequence if biodiversity were to decrease in the Arctic due to the extinction
of polar bears?
a. | changes in the food web, leading to a loss of food
resources for native people | b. | an increase in the
number of producers after a herbivore population boom | c. | disturbances in weather patterns, leading to a higher average water
temperature | d. | a decrease in the
number of herbivores due to natural predators being gone |
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10.
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90% of the world’s crops for humans comes
from only 20 different plant species. (Corn, Wheat, Rice, Soybeans, Potatoes, Tomatoes, Apples,
Oranges, Melons, etc ) In other words, the biodiversity for our crops is low.
Why is this
a problem?
a. | This is not a problem. We can eat meat instead of
fruits, grains, and vegetables. | b. | If a disease wipes
out one or more of these plants, there could be widespread food shortages. | c. | This is a problem because we need to consume calcium to make our bones
strong. | d. | With the variety of food sources we have available, many
people are overweight. |
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