What do you call organs working together to perform a specific bodily function

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.

The main reason tommy might use static stretching is a. to relax his entire body b. to prepare his muscles for sports c. to increase his long term flexibility d. to slow his body down after exercise

What would someone with good self-esteem do? a. learn from mistakes. b. reject constructive feedback. c. focus in weeknesses rather than strengths. d. strive for the perfect body.