Question 1

As far as we know all forms of life on Earth use _______ as a medium for chemical reactions.

Accepted Answer

A)  gaseous helium 
B)  frozen carbon dioxide 
C)  liquid water 
D)  frozen water 
A)  gaseous helium 
B)  frozen carbon dioxide 
C)  liquid water 
D)  frozen water D

Question 2

Describe three things that limit travel between stars.

Accepted Answer

Answer not provided.

Question 3

What limitation(s) make it impossible to travel between stars? I.fuel requirements
II.the tremendous distances between stars
III.the finite speed at which objects can travel

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  II & III 
E)  I, II, & III 
A)  I 
B)  II 
C)  III 
D)  II & III 
E)  I, II, & III E

Question 4

The most important quantity necessary for life to form appears to be the existence of ____________________ on the surface of the planet.

Accepted Answer

The answer of The most important quantity necessary for life...

Question 5

How can we select stars whose planets are likely homes for life?

Accepted Answer

The answer of How can we select stars whose planets...

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Question 8

DNA molecules cannot be altered by chance errors in reproduction.

Accepted Answer

A) True 
 B)False

Question 9

____ is a segment of a chromosome that controls a specific function.

Accepted Answer

A)  DNA 
B)  RNA 
C)  An enzyme 
D)  A gene 
E)  An amino acid 
A)  DNA 
B)  RNA 
C)  An enzyme 
D)  A gene 
E)  An amino acid

Question 10

What is ALH 84001 and why is it significant to discussions of the evolution of life?

Accepted Answer

The answer of What is ALH 84001 and why is...

Question 11

ALH 84001

Accepted Answer

A)  is a meteorite that shows possible evidence for life evolving on Mars. 
B)  is the compound used by Miller to begin his experiment to produce amino acids. 
C)  is the amino acid produced in the Miller experiment. 
D)  is the molecule that controls the reproduction of DNA within a cell. 
E)  is the molecule that acts as DNA's messenger that assembles proteins from amino acids. 
A)  is a meteorite that shows possible evidence for life evolving on Mars. 
B)  is the compound used by Miller to begin his experiment to produce amino acids. 
C)  is the amino acid produced in the Miller experiment. 
D)  is the molecule that controls the reproduction of DNA within a cell. 
E)  is the molecule that acts as DNA's messenger that assembles proteins from amino acids.

Question 12

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

Accepted Answer

The answer of What are the three properties of living...

Question 13

A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?

Accepted Answer

A)  3.3*-10 nm 
B)  3.3*10 nm 
C)  3*109 nm 
D)  300 nm 
E)  0.34 nm 
A)  3.3*-10 nm 
B)  3.3*10 nm 
C)  3*109 nm 
D)  300 nm 
E)  0.34 nm

Question 14

____ is the molecule created in the cell nucleus that carries the information to make specific proteins out in the cell body.

Accepted Answer

A)  An enzyme 
B)  DNA 
C)  RNA 
D)  ALH84001 
E)  PAH 
A)  An enzyme 
B)  DNA 
C)  RNA 
D)  ALH84001 
E)  PAH

Question 15

What kind of information is stored in the DNA molecules?

Accepted Answer

The answer of What kind of information is stored in...

Question 16

The Viking spacecraft searched for life on Mars by looking for the effects of life on the upper atmosphere.

Accepted Answer

A) True 
 B)False

Question 17

When considering the number of technologically advanced civilizations in our galaxy, it is useful to consider

Accepted Answer

A)  the average life span of an alien. 
B)  the average life span of the civilization. 
C)  the distance to the civilization's planet. 
D)  the type of advanced communication they use. 
A)  the average life span of an alien. 
B)  the average life span of the civilization. 
C)  the distance to the civilization's planet. 
D)  the type of advanced communication they use.

Question 18

What is the difference between chemical evolution and biological evolution?

Accepted Answer

The answer of What is the difference between chemical evolution...

Question 19

Deoxyribonucleic acid contains the genetic information of a cell. It is better known as

Accepted Answer

A)  vitamin D. 
B)  reproductive enzymes. 
C)  RNA. 
D)  DNA. 
E)  vitamin B12. 
A)  vitamin D. 
B)  reproductive enzymes. 
C)  RNA. 
D)  DNA. 
E)  vitamin B12.

Question 20

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.

As far as we know all forms of life on Earth use _______ as a medium for chemical reactions.

Describe three things that limit travel between stars.

What limitation(s) make it impossible to travel between stars? I.fuel requirements II.the tremendous distances between stars III.the finite speed at which objects can travel

The most important quantity necessary for life to form appears to be the existence of ____________________ on the surface of the planet.

How can we select stars whose planets are likely homes for life?

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

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

DNA molecules cannot be altered by chance errors in reproduction.

____ is a segment of a chromosome that controls a specific function.

What is ALH 84001 and why is it significant to discussions of the evolution of life?

ALH 84001

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

A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?

____ is the molecule created in the cell nucleus that carries the information to make specific proteins out in the cell body.

What kind of information is stored in the DNA molecules?

The Viking spacecraft searched for life on Mars by looking for the effects of life on the upper atmosphere.

When considering the number of technologically advanced civilizations in our galaxy, it is useful to consider

What is the difference between chemical evolution and biological evolution?

Deoxyribonucleic acid contains the genetic information of a cell. It is better known as

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

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

The Origin of the Solar System

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

As far as we know all forms of life on Earth use _______ as a medium for chemical reactions.

Describe three things that limit travel between stars.

What limitation(s) make it impossible to travel between stars? I.fuel requirements II.the tremendous distances between stars III.the finite speed at which objects can travel

The most important quantity necessary for life to form appears to be the existence of ____________________ on the surface of the planet.

How can we select stars whose planets are likely homes for life?

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

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

DNA molecules cannot be altered by chance errors in reproduction.

____ is a segment of a chromosome that controls a specific function.

What is ALH 84001 and why is it significant to discussions of the evolution of life?

ALH 84001

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

A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?

____ is the molecule created in the cell nucleus that carries the information to make specific proteins out in the cell body.

What kind of information is stored in the DNA molecules?

The Viking spacecraft searched for life on Mars by looking for the effects of life on the upper atmosphere.

When considering the number of technologically advanced civilizations in our galaxy, it is useful to consider

What is the difference between chemical evolution and biological evolution?

Deoxyribonucleic acid contains the genetic information of a cell. It is better known as

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

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

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Filters