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mikael mikael
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11 years ago
Mad cow disease is caused by
A) a retrovirus similar to HIV.
B) an enveloped virus.
C) small circular RNA molecules called viroids.
D) infectious proteins called prions.
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#1
11 years ago
This is for essentials biology, right? the answer is D. Bye for now.
Would you know my name, if I saw you in heaven?

Eric Clapton
mikael Author
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11 years ago
Thank you Grinning Face
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#3
10 years ago
Slight Smile Anytime
Would you know my name, if I saw you in heaven?

Eric Clapton
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