What does the "all-or-none phenomenon" refer to?
please help!

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.

After expecting a loss in his family, simon cannot sleep and refuses to eat. what aspect of health is simon’s grief affecting? choose one physical mental social emotional

Write 2 paragraphs why is sugar so addicting