Question 1

What does light absorption trigger during phototaxis?

Accepted Answer

A)  rapid changes in the concentrations of ions, including potassium and oxygen
B)  rapid changes in the concentrations of ions, including sodium and oxygen
C)  rapid changes in the concentrations of ions, including sodium and calcium
D)  rapid changes in the concentrations of ions, including potassium and calciumE) A) and B)
F) A) and C)

Question 2

Which two things are sensed by a Chlamydomonas cell's eyespot?

Accepted Answer

A)  light location and colour
B)  light location and intensity
C)  light energy and colour
D)  light energy and intensityE) C) and D)
F) A) and B)

Question 3

Explain why, after the Industrial Revolution in England, dark-coloured pepper moths became more abundant than the usual light-coloured moths, and why this case is often cited as an example of evolution by natural selection.

Accepted Answer

Before the Industrial Revolution, light-...

Question 4

Which term refers to an electromagnetic radiation that is of the longest wavelength and lowest energy?

Accepted Answer

A)  radio waves
B)  gamma rays
C)  UV light
D)  X-raysE) A) and C)
F) C) and D)

Question 5

Which of the following is of particular concern for causing damage by light energy?

Accepted Answer

A)  higher-energy gamma radiation
B)  lower-energy gamma radiation
C)  higher-energy ultraviolet radiation
D)  lower-energy ultraviolet radiationE) A) and C)
F) A) and D)

Question 6

What is the light used for in Chlamydomonas?

Accepted Answer

A)  as a source of information about the external environment
B)  as a source of information about the internal environment
C)  as a source of energy and as a source of information about the external environment
D)  as a source of energy and as a source of information about the internal environmentE) B) and D)
F) C) and D)

Question 7

Light serves two important functions for life on Earth. What is light's one source that sustains life, and what information does it provide organisms with?

Accepted Answer

A)  energy; information about chemical life
B)  chemicals; information about physical life
C)  chemicals; information about surrounding life
D)  energy; information about physical lifeE) None of the above
F) A) and B)

Question 8

The reason why many animals are able to attract other organisms is because they use colour.

Accepted Answer

A) True 
 B)False

Question 9

What controls circadian rhythms, and which environment sets this clock?

Accepted Answer

A)  an internal clock; an external environment
B)  an artificial clock; a natural environment
C)  an external clock; an internal environment
D)  a natural clock; an artificial environmentE) A) and B)
F) B) and D)

Question 10

What does photosynthesis capture?

Accepted Answer

A)  chemical energy
B)  light energy
C)  heat
D)  magnetic energyE) A) and C)
F) A) and D)

Question 11

Bioluminescence found in marine bacteria is used for communication.

Accepted Answer

A) True 
 B)False

Question 12

Which best describes photo-oxidative damage?

Accepted Answer

A)  low energy environments associated with pigment molecules and excited electrons
B)  high energy environments associated with pigment molecules and excited electrons
C)  high energy environments associated with pigment molecules and non-excited electrons
D)  low energy environments associated with pigment molecules and non-excited electronsE) C) and D)
F) None of the above

Question 13

When the plant is exposed to wavelengths of red light, phytochrome becomes inactive and initiates a signal transduction pathway.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following must occur in order for light to be used by an organism?

Accepted Answer

A)  The light must be transmitted.
B)  The light must be absorbed.
C)  The light must be transferred.
D)  The light must be reflected.E) B) and C)
F) A) and B)

Question 15

Which of the following characteristics of light is most commonly used for defining light as a portion of the electromagnetic spectrum?

Accepted Answer

A)  the fact that all living organisms can detect it
B)  the fact that plants can detect it
C)  the fact that humans can detect it with their eyes
D)  the fact that non-human animals can detect it with their eyesE) A) and B)
F) All of the above

Question 16

Explain how light pollution may affect natural populations. Give two examples.

Accepted Answer

The presence of artificial light (light ...

Question 17

How are leaf-dropping in trees and colour change in the coat of the Artic fox related?

Accepted Answer

A)  They are examples found in dark-dependent organisms.
B)  They are examples of adaptation to climate.
C)  They are examples found in organisms that live in the same area.
D)  They are examples of photoperiod-dependent phenomena.E) B) and C)
F) None of the above

Question 18

The Sun converts over 4 million tonnes of matter into energy every minute.

Accepted Answer

A) True 
 B)False

Question 19

Which term refers to an electromagnetic radiation that is of the shortest wavelength and highest energy?

Accepted Answer

A)  radio waves
B)  gamma rays
C)  UV light
D)  X-raysE) B) and D)
F) All of the above

Question 20

How did the eye that exists in humans and other animals appear?

Accepted Answer

A)  It did not appear suddenly.
B)  It possibly appeared suddenly.
C)  It definitely appeared suddenly.
D)  It is not known.E) A) and D)
F) All of the above

Exam 1: Light and Life

Which two things are sensed by a Chlamydomonas cell's eyespot?

Correct AnswerverifiedShow Answer

What is the light used for in Chlamydomonas?

Correct AnswerverifiedShow Answer

How did the eye that exists in humans and other animals appear?

Correct AnswerverifiedShow Answer

Which of the following characteristics of light is most commonly used for defining light as a portion of the electromagnetic spectrum?

Correct AnswerverifiedShow Answer

Which of the following is of particular concern for causing damage by light energy?

Correct AnswerverifiedShow Answer

What controls circadian rhythms, and which environment sets this clock?

Correct AnswerverifiedShow Answer

Bioluminescence found in marine bacteria is used for communication.

Correct AnswerverifiedShow Answer

Which term refers to an electromagnetic radiation that is of the shortest wavelength and highest energy?

Correct AnswerverifiedShow Answer

Which best describes photo-oxidative damage?

Correct AnswerverifiedShow Answer

The reason why many animals are able to attract other organisms is because they use colour.

Correct AnswerverifiedShow Answer

Which of the following must occur in order for light to be used by an organism?

Correct AnswerverifiedShow Answer

Explain how light pollution may affect natural populations. Give two examples.

Correct AnswerverifiedThe presence of artificial light (light ...View AnswerShow Answer

The Sun converts over 4 million tonnes of matter into energy every minute.

Correct AnswerverifiedShow Answer

Light serves two important functions for life on Earth. What is light's one source that sustains life, and what information does it provide organisms with?

Correct AnswerverifiedShow Answer

When the plant is exposed to wavelengths of red light, phytochrome becomes inactive and initiates a signal transduction pathway.

Correct AnswerverifiedShow Answer

How are leaf-dropping in trees and colour change in the coat of the Artic fox related?

Correct AnswerverifiedShow Answer

What does light absorption trigger during phototaxis?

Correct AnswerverifiedShow Answer

Explain why, after the Industrial Revolution in England, dark-coloured pepper moths became more abundant than the usual light-coloured moths, and why this case is often cited as an example of evolution by natural selection.

Correct AnswerverifiedBefore the Industrial Revolution, light-...View AnswerShow Answer

What does photosynthesis capture?

Correct AnswerverifiedShow Answer

Which term refers to an electromagnetic radiation that is of the longest wavelength and lowest energy?

Correct AnswerverifiedShow Answer

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The presence of artificial light (light ...
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Before the Industrial Revolution, light-...
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