list one key similarity and one key difference between a vaccine and the pathogen it protects against

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Nucleic acid certain protein cell membranes certain carbohydrates

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?