Why can't nonmetals conduct electricity?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes