Name 3 ways to improve or maintain enviromental health

Which training principle states that exercising a certain body part are practicing a particular skill primarily develops that part or skill

Is it bad to have a headache all day long?

Which of the following represents a difference between viruses and viroids? a) viruses infect many types of cells, whereas viroids infect only prokaryotic cells.b) viruses have capsids composed of protein, whereas viroids have no capsids.c) viruses have genomes composed of rna, whereas viroids have genomes composed of dna.d) viruses cannot pass through plasmodesmata, whereas viroids can.