Before the discovery of prions, many biologists would have agreed with the statement ‘’ It is a fact that no infectious organism or particle can exist that lacks nucleic acid (such as DNA or RNA) ``. What lessons do prions teach us about nature, science, and scientific inquiry?

substitution is the answer in this case

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.