What are the names and functions of the structures labeled 1 and 2? 1 - testicle, produces semen; 2 - epididymis, carries sperm 1 - scrotum, produces sperm; 2 - urethra, carries semen 1 - scrotum, protects testicles; 2 - testicle, produces sperm 1 - urethra, carries sperm; 2 - testicle, produces sperm

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.