9814822
Description
Quiz by PEDRO ÁLVAREZ JIMÉNEZ, updated more than 1 year ago
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Created by PEDRO ÁLVAREZ JIMÉNEZ
over 7 years ago
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Question 1
Answer
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All parasites live in or on host organisms
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All parasites kill their hosts
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All parasites need mosquitoes to move from one host to the next
Question 2
Question
What do Gordian worms do to their cricket hosts?
Answer
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They make crickets move erratically
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They make crickets move close to water
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All of the above
Question 3
Question
Suppose you did an experiment in which you gave uninfected rats and rats infected with Toxoplasma a choice between hiding places sprinkled with the urine of cats and rabbits. Which of the following results would you expect to observe?
Answer
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Uninfected and infected rats both prefer hiding places with cat urine
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Uninfected and infected rats both prefer hiding places with rabbit urine
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Uninfected rats prefer hiding places with rabbit urine, while infected rats prefer hiding places with cat urine
Question 4
Question
Dogs infected with rabies virus are aggressive and produce lots of saliva. These symptoms help the virus move on to the next host.
Answer
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False; these symptoms help the host get rid of the virus
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True; the saliva will contaminate the environment, from which other hosts become infected
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True; these symptoms make the host likely to bite another host and thereby transmit the virus
Question 5
Question
How many organisms on Earth are considered parasites?
Answer
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One-third
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More than one-half
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Nearly all of them
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