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The History of Life 145

Name Date

Main Idea Details

amino acid

spontaneous generation

theory of biogenesis

endosymbiont theory

mechanism

The History of LifeSection 2 The Origin of Life

NewVocabulary

AcademicVocabularyAcademicVocabulary

ReviewVocabularyReviewVocabulary

Scan Section 2 of the chapter. Use the checklist as a guide.

Read all section titles.

Read all boldfaced words.

Look at all pictures and read the captions.

Think about what you already know about the history of life.

Write three facts you discovered about the origin of life.

1.

2.

3.

Use your book or dictionary to define amino acid. Use the term in a sentence to show its scientific meaning.

Use your book or dictionary to define each term.

Define mechanism to show its scientific meaning.

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Create a cartoon that illustrates how Redi’s experiment was used to disprove spontaneous generation.

Compare spontaneous generation and biogenesis.

Spontaneous BiogenesisBoth

Model Oparin’s primordial soup hypothesis for the formation of simple organic molecules by filling in the graphic organizer below.

started chemical reactions of gases in the early atmosphere

Identify four requirements for life using the concept map below.

Requirements for Life

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146 The History of Life

Name Date

Main Idea Details

Origins: Early Ideas

I found this information

on page .

Origins: Modern Ideas

I found this information

on page .

Section 2 The Origin of Life (continued)

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The History of Life 147

Name Date

Main Idea Details

Cellular EvolutionI found this information

on page .

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart below.

little oxygen in atmo-sphere; all living things are anaerobic

ozone layer forms

Identify three properties that mitochondria and chloroplasts share with prokaryotes.

1.

2.

3.

Analyze the endosymbiont theory of the evolution of plant cells by completing the sequence chart.

bacteria

evolved into

mitochondria

Section 2 The Origin of Life (continued)

Analyze how the four requirements for life were identified by scientists.

SUMMARIZE

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Tie It TogetherWrite an analogy to explain the difference between radiometric and relative dating. Develop a second analogy to explain the endosymbiont theory.

Analogy of methods for dating rock and fossils used by palentologists:

Analogy of endosymbiont theory:

SUMMARIZE

148 The History of Life

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