Download Unit 7 Biodiversity Guided Reading

Unit 7 Biodiversity Guided Reading
Name: _________________________
Pd: ____
2/8/16
Directions: Read chapter 7 (p199-p219) to answer the questions below.
1. Explain why a population with high genetic diversity has more of a chance of
survival than one with low genetic diversity.
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2. Identify the following ecosystems as having HIGH or LOW ecological diversity:
a. Seashore with ocean waters and forested cliffs:
b. A large area of farmland:
HIGH
HIGH
or
or
LOW
LOW
3. Which group of animals has the highest known species diversity? ___________
4. Would you expect to find greater biodiversity near the equator or near at the
North Pole? Provide a reason for your response.
Equator or North Pole
My reason is
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5. A stable ecosystem is both ______________ and resilient.
6. Explain how extinction is a natural process?
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7. How does extirpation differ from extinction?
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8. Which type of species is more likely to become extinct?
Circle the correct answer: A Threatened Species or An Endangered Species
9. What is the greatest cause of biodiversity loss today?
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10. Many protected animals are lost to poaching. What is the main motivation behind
poaching?
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11. How do warming temperatures affect animals that live in cold climates?
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12. List five causes of biodiversity loss:
a.
b.
c.
d.
e.
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13. In 1973, the _______________ ____________ _____________ was introduced
to help protect biodiversity. It has since helped with the recovery of a number of
species, including the bald eagle.
14. Since 1975, the ______________ treaty has helped to decrease the number of
endangered species that were transported internationally.
15. The Species Survival Plan (SSP) has helped many species, such as the golden
lion tamarin, recover. The main goal is reintroducing captive-bred animals into
the wild. Different techniques have been used, such as _____________, which
involves inserting DNA from an endangered species into a cultured egg cell that
has had its nucleus removed. However, a drawback is without habitat and
protection in the wild the animals have little chance for recovery.
Unit 7 Biodiversity Guided Reading
Name: key
Pd: ____
2/8/16
Directions: Read chapter 7 (p199-p219) to answer the questions below.
1. Explain why a population with high genetic diversity has more of a chance of
survival than one with low genetic diversity.
A population with high genetic diversity has more chance of survival
than one with low genetic diversity because it has a better chance of
adapting to environmental change or disease. Low genetic diversity can
lead to producing offspring that cannot adapt to change and is more
vulnerable to disease.
2. Identify the following ecosystems as having HIGH or LOW ecological
diversity:
a. Seashore with ocean waters and forested cliffs:
b. A large area of farmland:
HIGH
LOW
3. Which group of animals has the highest known species diversity? Insects
4. Would you expect to find greater biodiversity near the equator or near at the
North Pole? Provide a reason for your response. Equator
My reason is that the overall pattern of biodiversity, called the latitudinal
gradient, is that there is an increase in species richness toward the
equator.
5. A stable ecosystem is both resistant and resilient.
6. Explain how extinction is a natural process?
It is a natural process because organisms have been going extinct for
all of Earth’s history.
7. How does extirpation differ from extinction?
Extinction occurs when the last member of a species dies globally.
While extirpation occurs when a particular species disappears from a
given area only, not globally.
8. Which type of species is more likely to become extinct?
Circle the correct answer: An Endangered Species
9. What is the greatest cause of biodiversity loss today?
Habitat loss (habitat fragmentation)
10. Many protected animals are lost to poaching. What is the main motivation
behind poaching?
Many animals, or animal parts, are sold illegally for large sums of
money.
11. How do warming temperatures affect animals that live in cold climates?
Warming temperatures are causing animals to move toward the poles
and higher altitudes in search of cooler climate. Some species will be
able to adapt. Others, such as the polar bear, will not.
12. List five causes of biodiversity loss:
a.
b.
c.
d.
e.
Habitat change and loss
Climate change
Invasive species
Pollution
Overharvesting (poaching)
13. In 1973, the Endangered Species Act (ESA) was introduced to help protect
biodiversity. It has since helped with the recovery of a number of species,
including the bald eagle.
14. Since 1975, the CITES treaty has helped to decrease the number of
endangered species that were transported internationally.
15. The Species Survival Plan (SSP) has helped many species, such as the
golden lion tamarin, recover. The main goal is reintroducing captive-bred
animals into the wild. Different techniques have been used, such as cloning,
which involves inserting DNA from an endangered species into a cultured egg
cell that has had its nucleus removed. However, a drawback is without habitat
and protection in the wild the animals have little chance for recovery.