What are the healthy sizes of teenage girls based on their ages?
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example: small, medium, large, extra-large

Why do rna viruses appear to have higher rates of mutation? a) rna nucleotides are more unstable than dna nucleotides.b) replication of their genomes does not involve proofreading.c) rna viruses can incorporate a variety of nonstandard bases.d) rna viruses are more sensitive to mutagens.

Describe factors that can make dishes in restaurants have nutritional values

The first step in treating water from a river or lake is usually