Evolution and Biodiversity - Questions

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12 Δεκ 2012 (πριν από 4 χρόνια και 10 μήνες)

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Unit 2
: Ch
4

Evolution & Biodiversity





Name______________________
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Read Ch 4


& answer the following



you may attach additional pages if needed


Date___________
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1.

Describe the 5 reasons why the earth is ‘just right’ for life:



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2.


List 4 types of evidence to
scientists study to learn about the earth’s early history and evolution:



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3.

___________________ is the change in a
population’s genetic makeup through successive generations. _________________,
not individuals, ________________ by becoming genetically different.

4.


Define:


Microevolution




Marcroevolution




5.


Random changes in the structure of number of DNA
molecules are called __________________. They can occur in 2 ways:



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6.


Only mutations that occur in ________________
___ cells are passed to offspring. Mutations are ____________________ and
are the only source of totally new genetic raw material.

7.


Define natural selection and discuss its mechanisms. ___________________________________________________________
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8.

Define coevolution and give 1 example. _____________________________________________________________________
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9.


Distinguish between fundamental niche and realized niche. Describe the factors that determine the realized niche.
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10.

Fill in the table:


Definition

Conditions that favor being generalist/specialist

2 examples


Generalist
species








Specialist
species








11.


Discuss the mechanisms of speciation.
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12.

Biologists estimate that __________ of all the species that ever existed are now extinct.

13.

Define:


Background
extinction





Mass
extinction





Mass
depletion





Adaptive
radiation





14.

Explain how speciation and extinction res
ult in the Earth’s biodiversity and how human activities impact biodiversity. ________
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15.

What is artificial selection and how has it been used? ___________________________________________________________
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16.

What is genetic engineering? ___________________________________________________________________
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17.


Name 5 reasons scientists have created genetically modified organisms (GMOs):



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18.


Describe the arguments for and against genetic engineering:

For genetic engineering

Against genetic engineering
















You should be familiar with the following
basic science
terms. Be sure to review them before the test:


Gene pool

Alleles






Sign here to acknowledge all of the responses above are your original work: ________________________________