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QUESTION 1

1. Homologues structures are structures in different organisms that are similar because:

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    They share the same environments.
    They evolved from the same ancestors.
    They are not similar at all, only superficially appear so.
    None of the given asnwers are correct.

5 points   

QUESTION 2

1. Barriers to reproduction between closely related species before the sperm and egg have fused are referred to as:

    prezygotic barriers
    pseudogenomic barriers
    postzygotic barriers
    hypertrophic recombinations

5 points   

QUESTION 3

1. Beaver tend to create conditions that increase biodiversity at the landscape level.

True

False

5 points   

QUESTION 4

1. During succession of old field to forests in new England what would best describe the sequence of tree types?

    Shade tolerant, shade intolerant
    Shade intolerant, shade tolerant
    Shade intolerant, drought resistant
    Drought resistant, shade intolerant

5 points   

QUESTION 5

1. Extinction of species is a normal biological process.  Why are scientists so concerned about the current “sixth” mass extinction?

(a) The types of organisms being affected by it.

(b) The extinction rate exceeds historical extinction rates.

(c) It affects only species that are rare anyway.

(d) None of the above.

    The types of organisms being affected by it.
    The extinction rate exceeds historical extinction rates.
    It affects only species that are rare anyway.
    None of the given answers are correct.

5 points   

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