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Darwin vs. Lamarck
Part 1: Determine whether the statement describes Darwin
(D), Lamarck (L), or both (B).
1.
____Theorized that organisms passed on acquired traits (traits that they
enhanced in their own lifetime).
2.
____Theorized that descent with modification occurs.
3.
____Developed a theory to explain how organisms have changed over
time.
4.
____Went on a five-year voyage onboard the HMS Beagle.
Part 2
Make this chart and fill it in
Type of Evolution
Definition
Example
Picture
Compares analogous
structure or
homologous
structures?
Do they have a recent
common Ancestor?
Convergent Evolution
Divergent Evolution
Vocabulary
1. Choose 6 words from the list below.
2. Make a Vocabulary chart (Word, Def, Pic/Ex)
Darwin’s Finches
Theory
Adaptation
Fitness
Natural Selection
Half-life
Radioactive Isotope
Endosymbiosis
Analogous Structures
Descent with Modification
Artificial Selection
Variation
Miller-Urey
Overproduction
Homologous Structures
Coevolution
Natural Selection
Part 1: Steps of Natural Selection
 Name and DESCRIBE each step of Natural Selection.
Part 2: Scenarios




Read each situation.
Decide whether it is a case of overproduction, competition, or Genetic Variations.
Identify your decision and explain your reasoning.
Some situations may involve one or more causes. For example, a situation may involve
overproduction and competition.
Scenario1: A mother sea turtle crawls onto shore and lays
over one hundred eggs. The eggs hatch and more than half
don’t survive.
Scenario 2: Some species of geckoes are different shades of green. These differences
help the species survive in different types of habitats in the regions where they live.
Scenario 3: A species of road runners nest in the hollowed out
bases of cactus plants. In one area of the desert, land developers
have bought the land and have removed most of the old cacti. Only
the road runners who are the best nest builders are able to survive.
Scenario 4: Rainbow trout live in the rivers of Minnesota. The
mother fish deposit hundreds of eggs into the water at one time. The rainbow trout that
survive are well adapted to the cold temperature of the river. However, a few of the
offspring can survive in water up to 20 degrees colder. During one especially cold winter,
most of the plants the trout feed on in the river dies from the cold. This caused a food
shortage for the rainbow trout that managed to survive the colder than normal water.
Scenario 5: A black widow reproduces hundreds of babies at one time.
Some of the babies can make much stronger webs than the other
spiders. A new type of insect moves into the area that is much larger
than the other flies. The new insects can easily break the webs of most
of the spiders. However, the spiders who spin the stronger webs are able to catch the
new insects.
Early Earth
1. Define Half-life
2. What is the half-life for the substance above?
3. Use the image above. How old is the sample after four halflives?
4. What fraction of a radioactive isotope would be left after
three half-lives?
5. How old is Earth?
6. Early earth’s atmosphere is hypothesized to have lacked this
gas.
7. Describe the Endosymbiosis Theory.
8. What are the three major trends in seen in the first cells?
Losalinuim-240 has a half life of 4 years.
9. What percent is left after 8 years?
10.
How old is sample if only ½ remains?
11.
What fraction is left at 16 years?
CONVERGENT, DIVERGENT OR CO-EVOLUTION
 Read each passage
 Decide whether the scenario is an example of convergent, divergent, or coevolution.
 Explain your reasoning by supporting evidence from the passage.
SCENARIO 1: Hummingbirds have a beak just the right length to reach
the nectar in a cardinal flower and as they feed their foreheads bump
into the pollen structure. Cardinal flowers are red which
hummingbirds can see but bees can’t. Cardinal flower’s pollen
structure is just the right length for the hummingbird to pick up
pollen as it feeds.
SCENARIO 2: In the ocean surrounding Antarctica, there are fish that survive the cold water by using a
molecule made of glycoproteins that circulates the blood and keeps it from freezing. Certain kinds of
worms that live in the Arctic Ocean also make antifreeze proteins that help them live in icy water.
SCENARIO 3: The Galloti atlantica and Galloti galloti lizards evolved through
natural selection from a common ancestor into a wide variety of different
looking lizards.
SCENARIO 4: 7 Whales, sharks, and penguins all have streamlined bodies and fins/flippers for moving in
water even though they belong in different classes of animals (mammals, fish, and birds).
SCENARIO 5: This kind of evolution is proven by DNA analysis and results in organisms with different
ancestors becoming more alike as they adapt to similar environments.
SCENARIO 6: Adaptive radiation is also known as _________________.
SCENARIO 7: Ostriches (birds) and giraffes (mammals) are both native to the
savannahs of Africa. They share the same characteristic of a very long neck.
SCENARIO 8: Ostriches are native to the savannahs of Africa, while penguins live in the polar regions.
Although ostriches and penguins are closely-related, they look very different.