Give a substantiated opinion on whether smoking of e cigarettes should be allowed on the Gautrain​

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.

Lifestyle diseases are caused by a combination of

How do you imagine the heart of a person with prolonged high blood pressure might look different from the heart of someone with normal blood pressure?