Dog undergoing a routine surgical operation is bleeding excessively. what is the likely cause? a. stomach disorder b. liver toxicity c. kidney toxicity d. a rat poison

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.