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Andru [333]
3 years ago
11

Down Syndrome results from a _________ chromosomal abnormality where there is an extra 21st chromosome.

Biology
1 answer:
Blababa [14]3 years ago
7 0
I think it's B Trisomy.
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Answer:

The second statement is correct: "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach."

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Hope that answers the question, have a great day!

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