Which of the following foods are perishable? meat milk yogurt all of the above?

In strenuous physical activities it is recommended to warm up and cool down ? true or false ?

Which is the lipid molecule that controls what types of molecules can pass though?

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.