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?

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

All ova contain sex chromosomes corresponding to: x y xx xy

There are only about 250,000 known fossil species. true or false