Animals that tend to have complex nervous systems are missing what?
Energy Energy. nervous system Chlorophyll backbone alleles abdomen brain
A B C D E F G H
Invertebrates are animals without a backbone.
Most animals without a backbone have a more complex nervous system.
Animals that tend to have complex nervous systems are missing what? (A) Energy (B) Energy. (C) nervous system (D) Chlorophyll (E) backbone (F) alleles (G) abdomen (H) brain