A:椰树是棕榈科植物,其果实被称为椰子,倒卵形或近圆形,长可达25厘米。椰子的果皮分为三层:外果皮革质,薄而光滑,质地致密,抗水性较好;中果皮厚而松散,纤维质,富有弹性,可保护果实落地时不致破裂;内果皮即椰壳,骨质,坚硬、不易变形,保护胚和胚乳,在其近基部有3个萌发孔。种皮为椰壳 A: Coconut palm is a palm plant, the fruit is called coconut, obovate or nearly circular, up to 25 cm long. Coconut peel is divided into three layers: exocarp leather quality, thin and smooth, dense texture, good water resistance; mesocarp thick and loose, fibrous, elastic, can protect the fruit landing will not be broken; endocarp coconut shell , Bone, hard, not easy to deform, protect embryos and endosperm, in its proximal base has 3 germination holes. Seed coat is coconut shell