Vaccines are effective in preventing diseases because they? a. interfere with the release of suppressor t cells b. are antibodies directed against specific pathogens c. contain specific b cells and t cells d. trigger antibody formation

Which of the rock examples below is most likely to be metamorphic

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

Where can a dna be found in a prokaryotic cell