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The Making of a Theory

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The Origin of Species Revised March 2018
www.BioInteractive.org Page 1 of 3
________
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The Origin of Species:
The Making of a Theory
Film Guide
Student Handout
NAME_______________________ _________________ DATE
This handout supplements the short film The Origin of Species: The Making of a Theory.
1. One of Alfred Russel Wallace’s motivations to travel to South America and the Malay Archipelago collecting
plants and animals was to sell his specimens to museums and collectors. What was Wallace’s other major
motivation?
a. To be a companion to the ship’s captain.
b. To add more evidence to Charles Darwin’s natural selection theory.
c. To understand the origin of species.
d. To save enough money to buy his own ship.
2. When Charles Darwin set sail on his five-year journey on the HMS Beagle, both he and most of his
contemporary scientists thought that
a. each species was specially created by God in its present form and did not change over time.
b. each species was a product of natural laws and changeable over time.
c. each species had been selectively bred by humans after the invention of agriculture.
d. each species had evolved into its present form by way of genetic mutation.
3. Which pair of characteristics (similarity and difference) are both correct comparisons of Darwin and
Wallace?
Similarity
Difference
a.
Both Darwin and Wallace were
naturalists.
Darwin published his natural selection theory in an 1839
book, whereas Wallace published his natural selection
theory in a scientific paper in 1859.
b.
Both Darwin’s and Wallace’s ideas
about natural selection were revealed
to the scientific community at the same
time.
Darwin’s ideas about natural selection were inspired by
what he observed on the Galápagos Islands, while
Wallace’s ideas about natural selection were inspired by
what he observed on the Malay Archipelago.
c.
Both Darwin and Wallace collected
specimens on the Galápagos Islands.
Before each began collecting specimens around the
Southern Hemisphere, Darwin thought species arose by
way of natural causes, while Wallace thought species were
specially created by God.
d.
Both Darwin and Wallace formulated
the natural selection theory at the
same time.
Wallace came from a wealthy, upper-class family, whereas
Darwin grew up in a family that did not have much money.
4. Darwin and Wallace both gathered a large number of observations and facts on which they based their
theories. Which of the following types of evidence was NOT part of the evidence they gathered?
a. fossil evidence
b. anatomical evidence
c. geographical distribution
d. genetic evidence
The Origin of Species Revised March 2018
www.BioInteractive.org Page 2 of 3
________
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_
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Film Guide
The Origin of Species: The Making of a Theory
Student Handout
5. The diagrams to the right illustrate the bones in the forelimbs
of four different organisms. Although these limbs all look
different, they share some common patterns. These common
patterns suggest that
a. These organisms are members of the same species.
b. The organisms existed at about the same point in time.
c. These organisms share a common ancestor.
d. These organisms have exactly the same genes.
a. In one or two sentences, explain what this sketch represents.
6. The image below is the famous “I think” sketch that appears in one of Darwin’s notebooks.
b. Which observations from the list below support the ideas presented in Darwin’s sketch? List all the
statements that apply.
i. Tortoises from different islands of the Galápagos have different shells.
ii. Fossils of extinct animals resemble animals living today.
iii. Animals that are extinct were much larger than animals living today.
iv. The Galápagos Islands have only a few species of animals living on them.
v. Mockingbirds on different islands of the Galápagos have different markings.
c. Select one of the observations from question 6b above and explain in one or two sentences how it
supports the ideas presented in Darwin’s sketch.
7. Which observation led Wallace to conclude that all species are connected in a tree of life?
a. Around the globe, the more similar two species are, the closer to each other they tend to live.
b. Different species migrated from Australia to the islands of the Malay Archipelago.
c. Both the butterflies and the birds he studied had wings.
d. Darwin had published the same ideas in On the Origin of Species.
Revised March 2018
Page 3 of 3
_______ __________
Placental
mammals (i.e.,
monkeys)
Marsupial
mammals (i.e.,
kangaroos)
Film Guide
The Origin of Species: The Making of a Theory
Student Handout
8. Study the figure below showing the distribution of animals in the Malay Archipelago.
a. Explain how the distribution of animals supported Wallace’s evolution theory.
b. From a geological perspective, how did Wallace explain why placental mammals were found west of the
line, and marsupial mammals were found east of the line?
9. The image to the right shows the bones found within the flippers
of manatees. Similar bones are found in the flippers of whales.
What did Wallace conclude from observing these seemingly
useless structures and others like them?
10. Which observations led Wallace to understand how species change over time? List all the statements that
apply.
i. The same species are found in different parts of the world.
ii. The traits in a population vary from one individual to the next.
iii. The characteristics of individuals change when their environment changes.
iv. Populations tend to produce more offspring in each generation than will survive.
v. Individuals with traits that give them a slight advantage over other individuals in a population will
survive, and over time individuals with those traits will outnumber other individuals.
The Origin of Species
www.BioInteractive.org
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Completed 4 November 2020

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