Question 1

Stromatolites are rock-like columns composed of layers of fossilized ____.

Accepted Answer

A)  bones and tissue 
B)  fungi and planets 
C)  extremophile protists 
D)  photosynthetic algae 
E)  single-celled organisms 
A)  bones and tissue 
B)  fungi and planets 
C)  extremophile protists 
D)  photosynthetic algae 
E)  single-celled organisms

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

What was needed to develop in Earth's atmosphere to protect organisms from the harmful effects of ultraviolet radiation?

Accepted Answer

A)  weather patterns 
B)  a nitrogenous layer 
C)  a greenhouse effect 
D)  an ozone layer 
E)  reflective clouds 
A)  weather patterns 
B)  a nitrogenous layer 
C)  a greenhouse effect 
D)  an ozone layer 
E)  reflective clouds

Question 4

A low-luminosity star has a small and narrow ____, whereas a high-luminosity star has a large and wide one.

Accepted Answer

A)  UV range 
B)  life capability 
C)  habitable zone 
D)  adaptable zone 
E)  water hole 
A)  UV range 
B)  life capability 
C)  habitable zone 
D)  adaptable zone 
E)  water hole

Question 5

What makes silicon an unlikely source as the basis of life?

Accepted Answer

Though similar in structure to carbon an

Question 6

What technology do astronomers use to search for extraterrestrial life?

Accepted Answer

A)  space observatories 
B)  radio telescopes 
C)  refracting telescopes 
D)  reflecting telescopes 
E)  FM radio and televisions 
A)  space observatories 
B)  radio telescopes 
C)  refracting telescopes 
D)  reflecting telescopes 
E)  FM radio and televisions

Question 7

Earth sends out more signals into space by accident than with intent.

Accepted Answer

A) True 
 B)False

Question 8

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 9

Which is the process that explains how life adapts itself to a changing environment?

Accepted Answer

A)  biological evolution 
B)  environmental duplication 
C)  biological transformation 
D)  natural selection 
E)  genetic reproduction 
A)  biological evolution 
B)  environmental duplication 
C)  biological transformation 
D)  natural selection 
E)  genetic reproduction

Question 10

The chemical recipes of life are stored within each cell as information in _______________ molecules that resemble a ladder with rungs, composed of chemical bases.

Accepted Answer

The answer of The chemical recipes of life are stored...

Question 11

The most likely first form of life on Earth was probably an archaea-like extremophile tolerant of high temperatures.

Accepted Answer

A) True 
 B)False

Question 12

Why couldn't life have originated on any of the Jovian planets?

Accepted Answer

Jovian planets do not have solid surface

Question 13

Earth required only 1 million years to produce the first cells and another million years for intelligence to emerge.

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Accepted Answer

A) True 
 B)False

Question 16

What is the name for the radio frequency window astronomers use to search for extraterrestrial communication?

Accepted Answer

A)  Drake window 
B)  Phoenix waves 
C)  SETI window 
D)  water hole 
E)  OH hole 
A)  Drake window 
B)  Phoenix waves 
C)  SETI window 
D)  water hole 
E)  OH hole

Question 17

In Miller and Urey's experiment, what did they use to simulate the atmosphere in a sealed, glass container to produce amino acids and organic molecules?

Accepted Answer

A)  volcanic ash 
B)  electric arc 
C)  water vapor 
D)  liquid helium 
E)  nitrogen gas 
A)  volcanic ash 
B)  electric arc 
C)  water vapor 
D)  liquid helium 
E)  nitrogen gas

Question 18

Natural selection is random.

Accepted Answer

A) True 
 B)False

Question 19

What was Miller and Urey trying to replicate in their experiment?

Accepted Answer

A)  the formation of cell 
B)  the formation of ozone 
C)  the formation of photosynthesis 
D)  the formation of organic molecules 
E)  the formation of liquid water 
A)  the formation of cell 
B)  the formation of ozone 
C)  the formation of photosynthesis 
D)  the formation of organic molecules 
E)  the formation of liquid water

Question 20

Match between columns
                        Premises: the backbone element of all living things
compounds for structure and function of an organism
carries the genetic material of a cell
a segment of chromosomes that controls a certain function within a cell
a carrier of coded information to various location within the cell
errors or damage made to the DNA molecule
a long spiral molecule coded with information within the nucleus of a cell
the building blocks of proteins
regulators of chemical reactions within a cell
variations over time for an organism's survival

Accepted Answer

The Answer of natural selection and genes and DNA and is...

Exam 26: Astrobiology

Stromatolites are rock-like columns composed of layers of fossilized ____.

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

What was needed to develop in Earth's atmosphere to protect organisms from the harmful effects of ultraviolet radiation?

A low-luminosity star has a small and narrow ____, whereas a high-luminosity star has a large and wide one.

What makes silicon an unlikely source as the basis of life?

What technology do astronomers use to search for extraterrestrial life?

Earth sends out more signals into space by accident than with intent.

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

Which is the process that explains how life adapts itself to a changing environment?

The chemical recipes of life are stored within each cell as information in _______________ molecules that resemble a ladder with rungs, composed of chemical bases.

The most likely first form of life on Earth was probably an archaea-like extremophile tolerant of high temperatures.

Why couldn't life have originated on any of the Jovian planets?

Earth required only 1 million years to produce the first cells and another million years for intelligence to emerge.

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

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

What is the name for the radio frequency window astronomers use to search for extraterrestrial communication?

In Miller and Urey's experiment, what did they use to simulate the atmosphere in a sealed, glass container to produce amino acids and organic molecules?

Natural selection is random.

What was Miller and Urey trying to replicate in their experiment?

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Filters