Weres my dad at? help me

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.

What are 6 levels of organization for anatomy and psychology

Explain the signs and symptoms of alzheimer's disease with the following concepts: what causes this degenerative disease to occur in the brain? what would be the signs a patient should look for? explain.