Similar structures that have evolved independently in different lineages that do not share common ancestry are called
____.
a. analogous structures
b. homologous structures
c. vestigial structures
d. convergent structures
e. divergent structures
ANSWER: a
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Does the presence of the double bond in the hydrocarbon tail of oleic acid change the shape of the molecule? a. No, because the double bond strengthens the existing shape. b. No, because there is no double bond in oleic acid. c. Yes, because the double bond results in a bend in the molecule, forming a rightangle
d. Yes, because the double bond results in a circular structure to the molecule.
Processed pseudogenes are useful for testing Darwin's theory of descent with modification because they ________
A) can be utilized for examining phylogenetic relationships among asexually reproducing organisms B) demonstrate phylogenetic relationships of divergence because they do not accumulate mutations C) accumulate mutations at a constant rate, and thus older processed pseudogenes should be shared by a greater variety of species D) are distributed in organisms that are found in similar environments
Plague is a quarantinable disease.
Answer the following statement true (T) or false (F)
The Eukarya split from the Archaea:
a) about 2.5 billion years ago. b) about 4 million years ago. c) about 2.5 million years ago. d) about 4 billion years ago. e) about 400 million years ago.