Question 1

What are the "rungs" of a DNA spiral made up of?

Accepted Answer

A)  RNA 
B)  four chemical bases arranged in pairs 
C)  enzymes 
D)  ribosomes 
E)  proteins 
A)  RNA 
B)  four chemical bases arranged in pairs 
C)  enzymes 
D)  ribosomes 
E)  proteins

Question 2

Was oxygen a part of Earth's early atmosphere? Explain how today's atmosphere evolved to support life.

Accepted Answer

No, it is hypothesized that Earth's earl

Question 3

Aside from Earth, Venus is the most likely place for life to exist in the Solar System.

Accepted Answer

A) True 
 B)False

Question 4

Which describes the direct change in genetic information of a cell?

Accepted Answer

A)  chromosome 
B)  mutation 
C)  evolution 
D)  natural selection 
E)  heredity 
A)  chromosome 
B)  mutation 
C)  evolution 
D)  natural selection 
E)  heredity

Question 5

About 540 million years ago, a sudden increase in biological complexity occurred, known as the _______________.

Accepted Answer

The answer of About 540 million years ago, a sudden...

Question 6

Which type of main-sequence star(s) is a good candidate for searching Earth-like planets with life?

Accepted Answer

A)  O and B 
B)  G and K 
C)  A and F 
D)  white dwarfs 
E)  binary stars 
A)  O and B 
B)  G and K 
C)  A and F 
D)  white dwarfs 
E)  binary stars

Question 7

Human DNA is made up of billions of chemical bases.

Accepted Answer

A) True 
 B)False

Question 8

Molecular biologists must determine the order in which the ____ occur along the DNA ladder.

Accepted Answer

A)  base pairs 
B)  RNA strands 
C)  chromosome strands 
D)  carbon atoms 
E)  genetic coding 
A)  base pairs 
B)  RNA strands 
C)  chromosome strands 
D)  carbon atoms 
E)  genetic coding

Question 9

Which moon is rich in organic molecules but too cold to support chemical evolution?

Accepted Answer

A)  Europa 
B)  Titan 
C)  Enceladus 
D)  Io 
E)  Ganymede 
A)  Europa 
B)  Titan 
C)  Enceladus 
D)  Io 
E)  Ganymede

Question 10

Discuss the Miller-Urey experiment. What did these scientists had set out to prove?

Accepted Answer

An important experiment performed by Sta

Question 11

When deciphered correctly, an anticoded message ultimately becomes ____.

Accepted Answer

A)  a mathematic equation 
B)  letters and words 
C)  Morse code 
D)  a picture of life on Earth 
E)  music 
A)  a mathematic equation 
B)  letters and words 
C)  Morse code 
D)  a picture of life on Earth 
E)  music

Question 12

Genes are organized into long coiled chains called _______________.

Accepted Answer

The answer of Genes are organized into long coiled chains...

Question 13

The elements that we are all made of are common everywhere in the observable Universe.

Accepted Answer

A) True 
 B)False

Question 14

Jupiter's moon _______________ appears to have a liquid-water ocean below its icy crust and may contain minerals as a source of raw material for chemical evolution.

Accepted Answer

The answer of Jupiter's moon _______________ appears to have a...

Question 15

The New Horizons probe will take about 90,000 years to travel to the center of the galaxy.

Accepted Answer

A) True 
 B)False

Question 16

What do the radio pulses within the anticoded message sent in 1974 represent?

Accepted Answer

A)  all the letters in the alphabet 
B)  dots and dashes, like Morse code 
C)  binary numbers, ones and zeroes 
D)  Music, notes and measures 
E)  the numbers one through ten 
A)  all the letters in the alphabet 
B)  dots and dashes, like Morse code 
C)  binary numbers, ones and zeroes 
D)  Music, notes and measures 
E)  the numbers one through ten

Question 17

When a cell divides, only one cell gets the original DNA molecules.

Accepted Answer

A) True 
 B)False

Question 18

Why is it difficult to find fossils representative of the time that life began on Earth?

Accepted Answer

Fossils this old are difficult to recogn

Question 19

The physical bases of life on Earth are oxygen and water.

Accepted Answer

A) True 
 B)False

Question 20

What would a civilization within 60 light-years away be able to detect from Earth?

Accepted Answer

A)  our first TV transmissions 
B)  our cellular phone transmissions 
C)  our production of machines that create noise 
D)  our excessive carbon emissions 
E)  our wireless Internet transmissions 
A)  our first TV transmissions 
B)  our cellular phone transmissions 
C)  our production of machines that create noise 
D)  our excessive carbon emissions 
E)  our wireless Internet transmissions

What are the "rungs" of a DNA spiral made up of?

Was oxygen a part of Earth's early atmosphere? Explain how today's atmosphere evolved to support life.

Aside from Earth, Venus is the most likely place for life to exist in the Solar System.

Which describes the direct change in genetic information of a cell?

About 540 million years ago, a sudden increase in biological complexity occurred, known as the _______________.

Which type of main-sequence star(s) is a good candidate for searching Earth-like planets with life?

Human DNA is made up of billions of chemical bases.

Molecular biologists must determine the order in which the ____ occur along the DNA ladder.

Which moon is rich in organic molecules but too cold to support chemical evolution?

Discuss the Miller-Urey experiment. What did these scientists had set out to prove?

When deciphered correctly, an anticoded message ultimately becomes ____.

Genes are organized into long coiled chains called _______________.

The elements that we are all made of are common everywhere in the observable Universe.

Jupiter's moon _______________ appears to have a liquid-water ocean below its icy crust and may contain minerals as a source of raw material for chemical evolution.

The New Horizons probe will take about 90,000 years to travel to the center of the galaxy.

What do the radio pulses within the anticoded message sent in 1974 represent?

When a cell divides, only one cell gets the original DNA molecules.

Why is it difficult to find fossils representative of the time that life began on Earth?

The physical bases of life on Earth are oxygen and water.

What would a civilization within 60 light-years away be able to detect from Earth?

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Filters

Exam 17: Astrobiology: Life on Other Worlds

What are the "rungs" of a DNA spiral made up of?

Was oxygen a part of Earth's early atmosphere? Explain how today's atmosphere evolved to support life.

Aside from Earth, Venus is the most likely place for life to exist in the Solar System.

Which describes the direct change in genetic information of a cell?

About 540 million years ago, a sudden increase in biological complexity occurred, known as the _______________.

Which type of main-sequence star(s) is a good candidate for searching Earth-like planets with life?

Human DNA is made up of billions of chemical bases.

Molecular biologists must determine the order in which the ____ occur along the DNA ladder.

Which moon is rich in organic molecules but too cold to support chemical evolution?

Discuss the Miller-Urey experiment. What did these scientists had set out to prove?

When deciphered correctly, an anticoded message ultimately becomes ____.

Genes are organized into long coiled chains called _______________.

The elements that we are all made of are common everywhere in the observable Universe.

Jupiter's moon _______________ appears to have a liquid-water ocean below its icy crust and may contain minerals as a source of raw material for chemical evolution.

The New Horizons probe will take about 90,000 years to travel to the center of the galaxy.

What do the radio pulses within the anticoded message sent in 1974 represent?

When a cell divides, only one cell gets the original DNA molecules.

Why is it difficult to find fossils representative of the time that life began on Earth?

The physical bases of life on Earth are oxygen and water.

What would a civilization within 60 light-years away be able to detect from Earth?

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Filters