animal what is sophisticated
exoskeleton four limbs communication nervous system hormones in the frog family proteins circulatory systems
A B C D E F G H
Animals use sound in sophisticated ways.
animal communication is sophisticated
animal what is sophisticated (A) exoskeleton (B) four limbs (C) communication (D) nervous system (E) hormones (F) in the frog family (G) proteins (H) circulatory systems