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Exam 18: Organic Evolution The Theory and Its Supporting Evidence

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Question 1

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DNA is an abbreviation for ____________________.

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deoxyribonucleic acid

Question 2

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A clade is

A) a group of organisms and its most recent common ancestor.
B) a group of organisms on a phylogenetic tree.
C) a group of organisms that can interbreed and have fertile offspring.
D) a group of organisms in an evolutionary line from ancestor to descendent.

E) A) and D)
F) None of the above

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Question 3

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When was the greatest extinction of all time and what was the consequence of that extinction?

The process that involves changes in the genetic makeup of a population is ____________________.

The fossil record is biased because of selective preservation of organisms with ____________________ parts.

Alleles are the pair of controlling factors in genes,and both have equal dominance.

Who demonstrated that many plants and animals had become extinct through time and that fossils differed through time?

Features that serve the same purpose on very dissimilar organisms are called ____.

Structures which are superficially dissimilar but have the same structure in terms of bones,muscles,nerves,and blood vessels are ____.

Briefly explain how the concept of punctuated equilibrium is compatible with the fossil record.

All mutations are either harmful or beneficial.

If the offspring of the above situation with Aa mates with an individual with the makeup aa,what are the chances that an offspring will express the recessive trait? Explain.

In addition to fossils,what are other types of evidence for evolutionary theory?

The Lysenko affair shows the absurdity of basing scientific theories on philosophic or political beliefs.

Genes controlling the same trait are called ____________________.

What are body fossils?

Name some types of trace fossils.

Describe divergent evolution.

How can traits in organisms evolve over time?

With the Linnaean classification scheme,as one moves down the hierarchy,the categories become more ____.