Download Station 2 - kroymbhs

Evolution Station Review Lab
Name_______________________
Per____
Station 1:
Evolution by Natural Selection
Read the background information at the lab station and discuss in your group what the following terms mean.
Natural selection
Survival of the fittest
1.
Explain, in your own words, how Kettlewell’s moths exhibited the process of natural selection before and
after the industrial revolution.
Observe the pictures at the station and explain how each of the following adaptations improves the organism’s
fitness.
2. Organism A: Because of their shape and coloring, sargassum fish resemble certain seaweeds.
3. Organism B: A flower’s fragrance attracts bees.
Station 2:
The Development of New Species
Read the background information at the lab station and discuss in your group what the following terms mean.
Divergent evolution/Adaptive radiation
Reproductive isolation
Analogous structure
Speciation
Niche
Convergent evolution/parallel evolution
Look at Figures A, B, and C at the station, then answer the following questions.
1. The process shown in Figure A is divergent evolution, also known as adaptive radiation. Explain.
2. Why do the animals in Figure A look different from one another?
3. The process shown in Figure B is convergent evolution, also known as parallel evolution. Explain.
4. Why do the animals in Figure B look similar to one another?
5. What processes are illustrated in Figure C? Explain.
Station 3:
The Fossil Record
Observe Figure D and answer the following question.
1. Discuss the importance of fossils as a record of evolutionary change over time.
The questions below relate to Figure E, showing a hypothetical rock profile from two locations separated by a
distance of 67 km. There are some differences between the rock layers at the two locations. Apart from layers
D and L which are volcanic ash deposits, all other layers are comprised of sedimentary rock.
2. Assuming there has been no geological activity (e.g. tilting or folding), state in which rock layer (A-O) you
would find:
a. the youngest rocks at Location 1 _____
c. the youngest rocks at Location 2 _____
b. the oldest rocks at Location 1 _____
d. the oldest rocks at Location 2 _____
3. State which layer at location 1 is of the same age as layer M at location 2 _______________ Explain your
reasoning ______________________________________________________________________
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4. Using radiometric dating, the trilobite fossil was determined to be approximately 375 million years old.
The volcanic rock layer D was dated at 270 million years old, while rock layer B was dated at 80 million
years old. Give the approximate age range (i.e. greater than, less than, or between given dates) of the
rock layers listed below:
a. Layer A _______________________
d. Layer G _______________________
b. Layer C _______________________
e. Layer L _______________________
c. Layer E _______________________
f. Layer O _______________________
5. The type of dating you performed in question 6 is called ______________________ dating, since you are
estimating ages of fossils based on the layers of rock in which they were found.
Station 4:
Survival of the Sneakiest
Read the comic and answer the questions below.
1. When it comes to crickets, what does fitness mean?
2. Is calling good or bad for a cricket's fitness?
3. Give some examples of selection at work in this cricket story.
4. How does selection favor calling? How does selection favor not calling?
Station 5:
Comparative Anatomy
1.
Observe the pictures of the whale and bony fish. Look specifically at their fins. Whale fish fins and
bony fish fins are known as analogous structures. Why?
2.
Why are they NOT considered to be homologous structures?
3. Why are they NOT considered to be vestigial structures?
4.
Observe the pictures of the vertebrate forelimbs. Explain why the forelimbs of the vertebrate
animals illustrate homologous structures.
5.
Observe the picture of the cave fish. This is a species of fish that live in the underground caves in
Mexico, develop eyes as an embryo, but once born, the eyes degenerate and are covered with a flap
of skin; thus, they are blind. Because of this, their eyes are considered vestigial. Why?
Station 6:
Biochemical Evidence
1. Compare the amino acids in Cytochrome C of the human and the turtle.
2. Circle the differences in the data table below.
3. Repeat this procedure for the human and shark, as well as the human and fruit fly.
4.
According to this data, the human is more closely related to the turtle. Why?
5.
According to this data, the human is least closely related to the __________________. Why?
Station 7:
Embryology
1.
Observe the diagram of embryos by Haeckel. List similarities seen among the early embryos in row I.
2.
Explain how the similarities of organisms in their earliest stage of development is an evidence of
evolution.
Station 8:
Summary of Darwin’s discoveries
At your desk, write a paragraph explaining Darwin’s contributions to the concept of evolution and the
theory of natural selection.
In your explanation, make sure you include and explain the meaning of the following words in your
paragraph and underline these terms.
adaptations
beaks
change of species over time
evolution
finches
Galapagos islands
HMS Beagle
Natural Selection
species
survival of the fittest
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