Changes in the environment result in a. geologic eras c. plate tectonic changes b. physical changes in species d. all of the above select the best answer from the choices provided a b c d

Organisms may contain up to five levels of organization within their bodies. which level of organization is shown by the liver? a. tissue b. organ c. organism d. organ system

What are the characteristics of subsystem

You are studying a protein that you call protein x. there is an aspartic acid at a key position in protein x which is important in the folding and stabilization of that protein. if this aspartic acid is changed to a different amino acid, which type of amino acid substitutions is most likely to allow the protein to fold normally?