Where most of the mass of an atom is located. Oa. quark
Ob. electron cloud
Oc. isotopes
Od. energy levels
Oe, nucleus

What is a codon and where is it found

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which enzymes break down carbohydrates?