Most invertebrates are what?
microorganisms extinct creatures remains of prehistoric life more abundant dying species complex living creatures members of their own species ruined creatures
A B C D E F G H
All complex living creatures, are organized by a nervous system .
Most invertebrates are complex living creatures
Most invertebrates are what? (A) microorganisms (B) extinct creatures (C) remains of prehistoric life (D) more abundant (E) dying species (F) complex living creatures (G) members of their own species (H) ruined creatures