Ecology Final

6 Questions | By Kedric.carver | Updated: Feb 11, 2013 | Attempts: 131

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Questions and Answers

1.

A species feeding on the tissue of its host, while not killing it directly, is a
- A.
  
  Predator
- B.
  
  Parasite
- C.
  
  Parasitoid
- D.
  
  Cannibal
- E.
  
  Debilitator
Correct Answer
B. Parasite
2.

A “negatively phototaxic” amphipod will swim
- A.
  
  Away from parasitic worms
- B.
  
  Towards parasitic worms
- C.
  
  Away from competing amphipods
- D.
  
  Towards light
- E.
  
  Away from light
Correct Answer
E. Away from light
3.

Plagiorhynchus worms and Puccinia rusts are parasites that share the ability to change their hosts behavior in way that
- A.
  
  Increase the length of time they can survive in their hosts.
- B.
  
  Decrease their hosts mortality rates.
- C.
  
  Increase their hosts reproduction, thereby increasing production of parasite-infected offspring.
- D.
  
  Increase the likelihood of their (the parasites’) transmission to a new host.
- E.
  
  Decrease the hosts’ vulnerability to other parasites.
Correct Answer
D. Increase the likelihood of their (the parasites’) transmission to a new host.
4.

The presence of parasitic protozoa in a culture of competing Tribolium castaneum and T. confusum
- A.
  
  Increases the likelihood of coexistence.
- B.
  
  Decreases the likelihood of coexistence.
- C.
  
  Has no effect on the outcome of competition.
- D.
  
  Can reverse the outcome of competition.
- E.
  
  Has an effect on the outcome of competition only in the presence of predatory birds.
Correct Answer
D. Can reverse the outcome of competition.
5.

The infestation of prickly pear cactus (Opuntia) in Australia was controlled by the release of a moth, Cactoblastis, which impacts cactus populations because it
- A.
  
  Consumes cactus seeds.
- B.
  
  Consumes cactus pads.
- C.
  
  Introduces, as it attacks, fungi and bacteria that attack cactus pads
- D.
  
  Both consumes cactus seeds and consumes cactus pads.
- E.
  
  Both consumes cactus pads and introduces, as it attacks, fungi and bacteria that attack cactus pads.
Correct Answer
E. Both consumes cactus pads and introduces, as it attacks, fungi and bacteria that attack cactus pads.
6.

The standard error of the mean is equal to
- A.
  
  The sample variance divided by the sample size.
- B.
  
  The sample variance divided by the square root of the sample size.
- C.
  
  The sample standard deviation divided by the square root of the sample size.
- D.
  
  ) twice the square root of the sample size.
- E.
  
  Twice the square root of the sample variance.
Correct Answer
C. The sample standard deviation divided by the square root of the sample size.

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Current Version
Feb 11, 2013

Quiz Edited by
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Dec 11, 2011

Quiz Created by
Kedric.carver

Ecology Final

A species feeding on the tissue of its host, while not killing it directly, is a

A “negatively phototaxic” amphipod will swim

Plagiorhynchus worms and Puccinia rusts are parasites that share the ability to change their hosts behavior in way that

The presence of parasitic protozoa in a culture of competing Tribolium castaneum and T. confusum

The infestation of prickly pear cactus (Opuntia) in Australia was controlled by the release of a moth, Cactoblastis, which impacts cactus populations because it

The standard error of the mean is equal to