What is a symptom? condition that the doctor sees or notices on the patient

feeling or sensation that is experienced by the patient

special test that measures a patient's vital signs

preference that a patient tells the doctor about during an exam

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.