What was the long-term effect of the introduction of myxoma virus to control rabbits in Australia?
a. The rabbits were all killed.
b. Most rabbits became immune to the virus.
c. The virus killed off some of the rabbit population but also infected kangaroos and
wallabies.
d. The virus became less virulent and the rabbits gained some immunity.
e. The virus had no effect.
D
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Unlike most enveloped viruses, herpes viruses involve the host ________ membrane in the formation of their envelope.
A. mitochondrial B. nuclear C. plasma D. None of the choices are correct.
Which number identifies the structure that carries supplemental genetic information?
a. 1 b. 2 c. 3 d. 4 e. 5
How do companion cells load most of the carbohydrates into sieve tube members?
a. by symport b. through carrier proteins c. through plasmodesmata d. by antiport
The main criteria presently used for grouping viruses does NOT include
A) structure. B) chemical composition. C) similarities in genetic makeup. D) host infected.