Définition : A hard, thorny or needle-like structure which occurs on various organisms. Animals such as porcupines and sea urchins grow spines as a self-defense mechanism
Définition : A hard, thorny or needle-like structure which occurs on various organisms. Animals such as porcupines and sea urchins grow spines as a self-defense mechanism
Définition : a tropical monocot tree relying for support on overlapping leaves wrapping around the stem, thickened parenchyma cells, and prop or brace roots
