The diagram shows part of the human alimentary Canal  a name parts A and D

True or false a fertilized cell divides many times to form an embryo

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.

During polarization,potassium has a blank charge,sodium has a blank ch arge ,and calcium has a b l ank. charge