Which of the following would not be classified as innate bahavior? a baby smiling as she sees her brother walking in the door, humans crawling once their bones and ligaments are strong enough, sneezing as a result of a dog allergy, learning to ride a bike at age 5

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.