Before revision: Seashells are an ideal model system for understanding the morpho-elastic basis of exoskeleton evolution in invertebrates . During the formation of the shell, the mantle tissue secretes proteins and minerals that calcify to form a new incremental layer of the exoskeleton.
After revision: Seashells are an ideal model system for understanding the morpho-elastic basis of morphological evolution of invertebrates' exoskeletons . During the formation of the shell, the mantle tissue secretes proteins and minerals that calcify to form a new incremental layer of the exoskeleton.