Question 1

____________ 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 C

Question 2

The ____________ is a region around a star where liquid water can exist.

Accepted Answer

habitable zone

Question 3

When a cell divides, the chromosomes split widthwise and duplicate

Accepted Answer

A) True 
 B)False  False

Question 4

Because of __________, ___________, and ___________, physical interstellar travel is currently impossible.

Accepted Answer

distance,

Question 5

Presuming that it takes several billion years of complex live to evolve in a stable environment, the stars most likely to currently have inhabited planets with favorable conditions for life are

Accepted Answer

A)  G to K main-sequence stars. 
B)  B to A main-sequence stars. 
C)  G to K giants. 
D)  white dwarf stars 
E)  neutron stars. 
A)  G to K main-sequence stars. 
B)  B to A main-sequence stars. 
C)  G to K giants. 
D)  white dwarf stars 
E)  neutron stars.

Question 6

The wavelengths that are most likely for communication with other civilizations are those in the water hole.

Accepted Answer

A) True 
 B)False

Question 7

The primordial soup is not organic-rich.

Accepted Answer

A) True 
 B)False

Question 8

The unit of heredity is the ____________.

Accepted Answer

The answer of The unit of heredity is the ____________....

Question 9

____________ shows that the building blocks of life form naturally under a wide range of circumstances.

Accepted Answer

A)  The Miller-Urey experiment 
B)  The Chicxulub event 
C)  The earliest fossils 
D)  The Drake equation 
E)  Stromatolites 
A)  The Miller-Urey experiment 
B)  The Chicxulub event 
C)  The earliest fossils 
D)  The Drake equation 
E)  Stromatolites

Question 10

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 − 10 nm 
B)  3.3 × 1010 nm 
C)  3 × 109 nm 
D)  300 nm 
E)  0.33 nm 
A)  3.3 × 10 − 10 nm 
B)  3.3 × 1010 nm 
C)  3 × 109 nm 
D)  300 nm 
E)  0.33 nm

Question 11

____________ is the scientific study of the search for life on other worlds and the likelihood that life exists elsewhere.

Accepted Answer

The answer of ____________ is the scientific study of the...

Question 12

The portion of the electromagnetic spectrum between the 21-cm line of neutral hydrogen and the 18-cm line of OH is known as the ____________.

Accepted Answer

The answer of The portion of the electromagnetic spectrum between...

Question 13

Life is defined in this text to be a process that extracts energy from the surroundings, maintains itself, and modifies the surroundings to promote its own survival.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

Meteorite ALH 84001 is one of a dozen me

Question 15

The chemistry of life on Earth takes place in _____________.

Accepted Answer

A)  carbon 
B)  water 
C)  silicon 
D)  methyl alcohol 
A)  carbon 
B)  water 
C)  silicon 
D)  methyl alcohol

Question 16

What kind of information is stored in the DNA molecules?

Accepted Answer

The instructions sto

Question 17

The process shown above is ____________.

Accepted Answer

A)  cell splitting 
B)  mutation 
C)  life formation 
D)  copying 
A)  cell splitting 
B)  mutation 
C)  life formation 
D)  copying

Question 18

Which of the following is random?

Accepted Answer

A)  evolution 
B)  natural selection 
C)  genetic variation 
D)  All of the other choices are correct. 
A)  evolution 
B)  natural selection 
C)  genetic variation 
D)  All of the other choices are correct.

Question 19

The Arecibo radio message to extraterrestrials contains information about the structure of DNA.

Accepted Answer

A) True 
 B)False

Question 20

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.

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

The ____________ is a region around a star where liquid water can exist.

When a cell divides, the chromosomes split widthwise and duplicate

Because of ____, _, and _______, physical interstellar travel is currently impossible.

Presuming that it takes several billion years of complex live to evolve in a stable environment, the stars most likely to currently have inhabited planets with favorable conditions for life are

The wavelengths that are most likely for communication with other civilizations are those in the water hole.

The primordial soup is not organic-rich.

The unit of heredity is the ____________.

____________ shows that the building blocks of life form naturally under a wide range of circumstances.

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 scientific study of the search for life on other worlds and the likelihood that life exists elsewhere.

The portion of the electromagnetic spectrum between the 21-cm line of neutral hydrogen and the 18-cm line of OH is known as the ____________.

Life is defined in this text to be a process that extracts energy from the surroundings, maintains itself, and modifies the surroundings to promote its own survival.

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

The chemistry of life on Earth takes place in _____________.

What kind of information is stored in the DNA molecules?

The process shown above is ____________.

Which of the following is random?

The Arecibo radio message to extraterrestrials contains information about the structure of DNA.

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

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

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

The ____________ is a region around a star where liquid water can exist.

When a cell divides, the chromosomes split widthwise and duplicate

Because of __________, ___________, and ___________, physical interstellar travel is currently impossible.

Presuming that it takes several billion years of complex live to evolve in a stable environment, the stars most likely to currently have inhabited planets with favorable conditions for life are

The wavelengths that are most likely for communication with other civilizations are those in the water hole.

The primordial soup is not organic-rich.

The unit of heredity is the ____________.

____________ shows that the building blocks of life form naturally under a wide range of circumstances.

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 scientific study of the search for life on other worlds and the likelihood that life exists elsewhere.

The portion of the electromagnetic spectrum between the 21-cm line of neutral hydrogen and the 18-cm line of OH is known as the ____________.

Life is defined in this text to be a process that extracts energy from the surroundings, maintains itself, and modifies the surroundings to promote its own survival.

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

The chemistry of life on Earth takes place in _____________.

What kind of information is stored in the DNA molecules?

The process shown above is ____________.

Which of the following is random?

The Arecibo radio message to extraterrestrials contains information about the structure of DNA.

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

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

Because of ____, _, and _______, physical interstellar travel is currently impossible.