Transcript The Origin and Diversification of Life on Earth

Chapter 10: The Origin and
Diversification of Life on Earth
Clicker Questions
by Kristen Curran, University of Wisconsin-Whitewater
Why is it important that Urey and
Miller’s experiment produced amino
acids?
1. Because they
DNA
2. Because they
RNA
3. Because they
protein
4. Because they
triglycerides
are the building blocks of
are the building blocks of
are the building blocks of
are the building blocks of
The biological species concept is not easily applied to
bacteria and fossils. What other characteristics could
we use to decide whether two different bacteria are
two different species?
1. Observe asexual reproduction.
2. Measure the size of each bacteria.
3. Compare the sequences of specific
genes in the bacteria.
4. All of the above.
Which answer below is considered to be
a postzygotic barrier to reproduction?
1. Two species of frogs mate at different times in
the spring.
2. Birds about to mate need to go through specific
courtship rituals.
3. The male gamete (pollen) of one flower is not
compatible with the female organs of another
flower.
4. Fertilization occurs, but the embryo dies before
it is born.
5. There is a mechanical isolation that prevents
fertilization.
Which answer below would require the
morphological species concept to
delineate between the two species?
1. Dog and cat
2. Salmonella and E. coli
3. Cow and goat
4. Donkey and horse
Classroom Catalyst
Allopatric vs. Sympatric
Speciation
All of the answers below are examples of allopatric
speciation except…
1. Salamanders that have migrated via two different
routes display different color patterns.
2. There are 14 different species of finch on the
Galapagos islands vs. one species on South America.
3. Two species of benthic fish are found in a volcanic
crater that is known to have only been colonized by
one species of benthic fish about 10,000 years ago.
4. Species of lobster on the east side of the isthmus of
Panama are different from those on the west side.
Which animals are represented in a
monophyletic group indicated by the red arrow?
1. Fish, bird, human,
rat, and mouse
2. Bird, human, rat
and mouse
3. Human, rat, and
mouse
4. Rat and mouse
Below are genetic sequences for a gene found in
four different species. Which species are the
most closely related?
Species
Species
Species
Species
1.
2.
3.
4.
A:
B:
C:
D:
Species
Species
Species
Species
AGT-CTA-CTT-ACT-ATC-CTA
AGT-CTA-CTT-ACC-ATC-CTA
AGT-AAA-CTT-ACC-ATC-CTA
AGA-CTA-TTT-ACC-ATG-CTA
A and
A and
A and
B and
B
C
D
D
Which structures below are
homologous?
1. Human forearm and a monkey’s
forearm
2. Fish fin and whale fin
3. Butterfly wing and bat wing
4. All of the above
The ability of multiple species to
evolve via adaptive radiations is
due to _______ over time.
1.
2.
3.
4.
Macroevolution
Microevolution
Punctuated equilibrium
Gradual change
Which single-celled organism below is
considered to be most closely related to
the first cell to exist on our planet?
1.
2.
3.
4.
5.
6.
Plants
Protists
Bacteria
Archeae
Animals
Fungi
Humans can be classified as…
1. Homo sapiens
2.
3.
4.
5.
Eukarya
Animals
Vertebrates
All of the above