Edward jenner made a huge contribution to the field of medicine. which statement best describes his contributionc testing

The bones of the extremities are parts of the a-appendicular skeleton b-axial skeleton c-long bone group d-medial skeleton

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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.