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Biology 2015

Sylvia S. Mader, Michael Windelspecht

Chapter 18

Origin and History of Life

Educators


Problem 1

For questions 1–5, match the statements with events in the key. Answers may be used more than once.
Key:
a. early Earth d. protocell evolves
b. monomers evolve e. self-replication system evolves
c. polymers evolve

The heat of the sun could have caused amino acids to form proteinoids.

Rikhil M.
Numerade Educator

Problem 2

For questions 1–5, match the statements with events in the key. Answers may be used more than once.
Key:
a. early Earth d. protocell evolves
b. monomers evolve e. self-replication system evolves
c. polymers evolve

In a liquid environment, phospholipid molecules automatically form a membrane

Rikhil M.
Numerade Educator

Problem 3

For questions 1–5, match the statements with events in the key. Answers may be used more than once.
Key:
a. early Earth d. protocell evolves
b. monomers evolve e. self-replication system evolves
c. polymers evolve

As the Earth cooled, water vapor condensed, and subsequent rain produced the oceans.

Rikhil M.
Numerade Educator

Problem 4

For questions 1–5, match the statements with events in the key. Answers may be used more than once.
Key:
a. early Earth d. protocell evolves
b. monomers evolve e. self-replication system evolves
c. polymers evolve

Miller’s experiment shows that under the right conditions, inorganic chemicals can react to form small organic molecules.

Rikhil M.
Numerade Educator

Problem 5

For questions 1–5, match the statements with events in the key. Answers may be used more than once.
Key:
a. early Earth d. protocell evolves
b. monomers evolve e. self-replication system evolves
c. polymers evolve

An abiotic synthesis may have occurred at hydrothermal vents.

Rikhil M.
Numerade Educator

Problem 6

Evolution of the DNA $\longrightarrow \mathrm{RNA} \longrightarrow$ protein system was a milestone, because the protocell could now
a. be a heterotrophic fermenter.
b. pass on genetic information.
c. use energy to grow.
d. take in preformed molecules.
e. All of these are correct

Rikhil M.
Numerade Educator

Problem 7

Fossils
a. are the remains and traces of past life.
b. can be dated absolutely according to their location in strata.
c. are usually remains of soft tissues, such as muscle.
d. have been found for all types of animals except humans.

Rikhil M.
Numerade Educator

Problem 8

For questions 8–12, match the phrases with the divisions of geologic time in the key. Answers may be used more than once.
Key:
a. Cenozoic era c. Paleozoic era
b. Mesozoic era d. Precambrian time

dinosaur diversity, evolution of birds and mammals

Rikhil M.
Numerade Educator

Problem 9

For questions 8–12, match the phrases with the divisions of geologic time in the key. Answers may be used more than once.
Key:
a. Cenozoic era c. Paleozoic era
b. Mesozoic era d. Precambrian time

contains the Carboniferous period

Rikhil M.
Numerade Educator

Problem 10

For questions 8–12, match the phrases with the divisions of geologic time in the key. Answers may be used more than once.
Key:
a. Cenozoic era c. Paleozoic era
b. Mesozoic era d. Precambrian time

prokaryotes abound; eukaryotes evolve and become multicellular

Rikhil M.
Numerade Educator

Problem 11

For questions 8–12, match the phrases with the divisions of geologic time in the key. Answers may be used more than once.
Key:
a. Cenozoic era c. Paleozoic era
b. Mesozoic era d. Precambrian time

mammalian diversification

Rikhil M.
Numerade Educator

Problem 12

For questions 8–12, match the phrases with the divisions of geologic time in the key. Answers may be used more than once.
Key:
a. Cenozoic era c. Paleozoic era
b. Mesozoic era d. Precambrian time

invasion of land

Rikhil M.
Numerade Educator

Problem 13

Continental drift helps explain
a. mass extinctions.
b. the distribution of fossils on the Earth.
c. geological upheavals, such as earthquakes.
d. climatic changes.
e. All of these are correct

Rikhil M.
Numerade Educator

Problem 14

Which scientist proposed the theory of continental drift?
a. Alfred Wegener
b. Stanley Miller
c. Thomas Cech
d. Claudia Huber
e. David Deamer

Rikhil M.
Numerade Educator

Problem 15

Mass extinctions occurred during all of the following periods except which one?
a. Devonian
b. Permian
c. Triassic
d. Cretaceous
e. Carboniferous

Rikhil M.
Numerade Educator