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Transcript
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
16.1 Directed Reading
Section: Developing a Theory
In the space provided, write the letter of the term or phrase that best completes
each statement or best answers each question.
_____ 1. Evolution is
a. the mechanism by which individuals change over time.
b. the process by which species change over time.
c. known to occur by use and disuse of characters.
d. change in habitat through time.
_____ 2. Charles Darwin is credited with
a. providing evidence for how evolution occurs.
b. developing a mechanism for how evolution occurs.
c. proposing a theory known as gradualism.
d. Both (a) and (b)
_____ 3. How did Darwin gather a great deal of evidence for evolution at work?
a. by mere speculation
b. by breeding a variety of dogs
c. as a naturalist during the voyage of the Beagle
d. by preparing books about population growth rates
_____ 4. Darwin learned that there were resemblances between the plants and
animals of South America and
a. Ecuador.
c. Australia.
b. the Galápagos Islands.
d. the English countryside.
Read the question, and write your answer in the space provided.
5. What is artificial selection?
_______________________________________________________________
_______________________________________________________________
6. What were Jean Baptiste Lamarck’s ideas on inheritance?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
1
Evolutionary Theory
Name ______________________________ Class ___________________ Date __________________
Directed Reading continued
Complete each statement by underlining the correct term or phrase in the
brackets.
7. [Descent with modification / Artificial selection] is change in traits in groups
over time.
8. Both Lamarck and Darwin proposed that organisms [go extinct in/ adapt to]
changing environments.
In the space provided, explain how the terms differ in meaning.
9. linear population growth, exponential population growth
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
2
Evolutionary Theory