Question 1

In the Arecibo message shown above, the purple line leads to a purple arc with a letter M, which represents ______________.

Accepted Answer

A)  a common color of the rainbow being transmitted in a region of the EM spectrum that text messages are sent in 
B)  two letters of the Greek alphabet 
C)  the radio dish sending a common letter of the English alphabet 
D)  the radio dish sending a signal 
A)  a common color of the rainbow being transmitted in a region of the EM spectrum that text messages are sent in 
B)  two letters of the Greek alphabet 
C)  the radio dish sending a common letter of the English alphabet 
D)  the radio dish sending a signal

Question 2

As shown above, which contributes the most to the total noise in the region that may be likely for interstellar communication?

Accepted Answer

A)  noise from galaxy 
B)  noise from Earth's atmosphere 
C)  background radiation and/or noise from Earth's atmosphere 
D)  quantum mechanical noise 
A)  noise from galaxy 
B)  noise from Earth's atmosphere 
C)  background radiation and/or noise from Earth's atmosphere 
D)  quantum mechanical noise

Question 3

The oldest fossils on Earth are more than 3 billion years old.

Accepted Answer

A) True 
 B)False

Question 4

DNA molecules cannot be altered by chance errors in reproduction.

Accepted Answer

A) True 
 B)False

Question 5

It is expected that planets around high-mass main-sequence stars would be good places to search for extraterrestrial life.

Accepted Answer

A) True 
 B)False

Question 6

The complex organism fossil cast shown above first appeared in the __________ period.

Accepted Answer

A)  Pre-Cambrian 
B)  Cambrian 
C)  Tertiary 
D)  Jurassic 
A)  Pre-Cambrian 
B)  Cambrian 
C)  Tertiary 
D)  Jurassic

Question 7

Life emerged from the oceans 400 million years ago.

Accepted Answer

A) True 
 B)False

Question 8

The most likely region of the radio spectrum for communication with other civilizations is the water hole, the part of the spectrum

Accepted Answer

A)  near the radio emission of water. 
B)  near the radio emission of oxygen molecules. 
C)  between the radio emissions of hydrogen and oxygen. 
D)  between the radio emissions of hydrogen and OH. 
E)  near the radio band where water in the Earth's atmosphere strongly absorbs energy. 
A)  near the radio emission of water. 
B)  near the radio emission of oxygen molecules. 
C)  between the radio emissions of hydrogen and oxygen. 
D)  between the radio emissions of hydrogen and OH. 
E)  near the radio band where water in the Earth's atmosphere strongly absorbs energy.

Question 9

A cell's DNA molecules contain its genetic material. An offspring born with altered DNA due to radioactivity, cosmic rays, or errors in reproduction

Accepted Answer

A)  is called a mutant. 
B)  is called a new species. 
C)  is more likely to survive than if its DNA were not altered. 
D)  is no different than if its DNA were unchanged. 
E)  will never be able to reproduce itself. 
A)  is called a mutant. 
B)  is called a new species. 
C)  is more likely to survive than if its DNA were not altered. 
D)  is no different than if its DNA were unchanged. 
E)  will never be able to reproduce itself.

Question 10

Replicating early Earth conditions in the lab, the Miller experiment created from inorganic chemicals

Accepted Answer

A)  life. 
B)  artificial proteins. 
C)  DNA. 
D)  simple molds. 
E)  amino acids. 
A)  life. 
B)  artificial proteins. 
C)  DNA. 
D)  simple molds. 
E)  amino acids.

Question 11

Natural selection is random.

Accepted Answer

A) True 
 B)False

Question 12

The best places for life to have formed on Earth are believed to have been

Accepted Answer

A)  near the south pole in places where water is frozen solid as ice. 
B)  on the continent of Africa in the areas with no water. 
C)  in liquid water, probably in the oceans or pools of water. 
A)  near the south pole in places where water is frozen solid as ice. 
B)  on the continent of Africa in the areas with no water. 
C)  in liquid water, probably in the oceans or pools of water.

Question 13

What are the three properties of living things that the chapter identifies?

Accepted Answer

​ 
 Life is a process by which

Question 14

Even if societies on stars in distant galaxies survive at a technological level for only 10 years, that is long enough to establish two-way communication with them.

Accepted Answer

A) True 
 B)False

Question 15

No other planet in our solar system has been confirmed to have life.

Accepted Answer

A) True 
 B)False

Question 16

____________ are composed of bacterial mats and sediment layers.

Accepted Answer

The answer of ____________ are composed of bacterial mats and...

Question 17

In the Arecibo message shown above, the yellow line leads to a yellow block, which represents ____________.
​

Accepted Answer

A)  Earth 
B)  the Sun 
C)  a common shape in the universe 
D)  All of the other choices are correct. 
A)  Earth 
B)  the Sun 
C)  a common shape in the universe 
D)  All of the other choices are correct.

Question 18

Explain each symbol's color, shape, and meaning in the Arecibo message shown in Figure 20-10.

Accepted Answer

The colors are added fro clarity. The me

Question 19

The oldest fossils on Earth

Accepted Answer

A)  show that life began in Africa. 
B)  show that life began in lush regions between large rivers. 
C)  show that life began in the oceans. 
D)  are at least 5 billion years old. 
E)  at most 5 million years old. 
A)  show that life began in Africa. 
B)  show that life began in lush regions between large rivers. 
C)  show that life began in the oceans. 
D)  are at least 5 billion years old. 
E)  at most 5 million years old.

Question 20

A cell's DNA molecules contain its genetic material. DNA molecules contain patterns for the production of

Accepted Answer

A)  proteins. 
B)  amino acids. 
C)  phosphates and sugars. 
D)  four kinds of bases. 
E)  proteins, amino acids, phosphates, sugars, and four kinds of bases. 
A)  proteins. 
B)  amino acids. 
C)  phosphates and sugars. 
D)  four kinds of bases. 
E)  proteins, amino acids, phosphates, sugars, and four kinds of bases.

In the Arecibo message shown above, the purple line leads to a purple arc with a letter M, which represents ______________.

As shown above, which contributes the most to the total noise in the region that may be likely for interstellar communication?

The oldest fossils on Earth are more than 3 billion years old.

DNA molecules cannot be altered by chance errors in reproduction.

It is expected that planets around high-mass main-sequence stars would be good places to search for extraterrestrial life.

The complex organism fossil cast shown above first appeared in the __________ period.

Life emerged from the oceans 400 million years ago.

The most likely region of the radio spectrum for communication with other civilizations is the water hole, the part of the spectrum

A cell's DNA molecules contain its genetic material. An offspring born with altered DNA due to radioactivity, cosmic rays, or errors in reproduction

Replicating early Earth conditions in the lab, the Miller experiment created from inorganic chemicals

Natural selection is random.

The best places for life to have formed on Earth are believed to have been

What are the three properties of living things that the chapter identifies?

Even if societies on stars in distant galaxies survive at a technological level for only 10 years, that is long enough to establish two-way communication with them.

No other planet in our solar system has been confirmed to have life.

____________ are composed of bacterial mats and sediment layers.

In the Arecibo message shown above, the yellow line leads to a yellow block, which represents ____________.

Explain each symbol's color, shape, and meaning in the Arecibo message shown in Figure 20-10.

The oldest fossils on Earth

A cell's DNA molecules contain its genetic material. DNA molecules contain patterns for the production of

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Filters

Exam 20: Astrobiology: Life on Other Worlds

In the Arecibo message shown above, the purple line leads to a purple arc with a letter M, which represents ______________.

As shown above, which contributes the most to the total noise in the region that may be likely for interstellar communication?

The oldest fossils on Earth are more than 3 billion years old.

DNA molecules cannot be altered by chance errors in reproduction.

It is expected that planets around high-mass main-sequence stars would be good places to search for extraterrestrial life.

The complex organism fossil cast shown above first appeared in the __________ period.

Life emerged from the oceans 400 million years ago.

The most likely region of the radio spectrum for communication with other civilizations is the water hole, the part of the spectrum

A cell's DNA molecules contain its genetic material. An offspring born with altered DNA due to radioactivity, cosmic rays, or errors in reproduction

Replicating early Earth conditions in the lab, the Miller experiment created from inorganic chemicals

Natural selection is random.

The best places for life to have formed on Earth are believed to have been

What are the three properties of living things that the chapter identifies?

Even if societies on stars in distant galaxies survive at a technological level for only 10 years, that is long enough to establish two-way communication with them.

No other planet in our solar system has been confirmed to have life.

____________ are composed of bacterial mats and sediment layers.

In the Arecibo message shown above, the yellow line leads to a yellow block, which represents ____________. ​

Explain each symbol's color, shape, and meaning in the Arecibo message shown in Figure 20-10.

The oldest fossils on Earth

A cell's DNA molecules contain its genetic material. DNA molecules contain patterns for the production of

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Filters

In the Arecibo message shown above, the yellow line leads to a yellow block, which represents ____________.