论文部分内容阅读
S珊瑚是一种奇妙的海洋生物, 它是动物却有着植物的功能:它像动物一样靠精卵结合生殖,又象植物一样出芽,分裂繁殖。它生长在清澈的海底,小小的珊瑚虫可结成群体,形成“岛屿”。别看它的构造是这样的简单,连免疫系统都没有,但它的化学防御能力却很惊人。 珊瑚居住在自己分泌出的骨骼——珊瑚上的许多小孔里,每当一个新的珊瑚虫出生,“父亲”就会营造一个新的珊瑚孔。随着珊瑚虫的不断繁殖,珊瑚骨骼像树枝一样不断分出枝杈,向四周蔓延。珊瑚虫自己不能移动行走,只能依靠伸出的触须来等待自投罗网的食物。珊瑚枝上的的无数珊瑚虫都被一根管子连接起来,任何
S Coral is a fantastic marine creature. It is an animal that has the function of a plant: it reproduces like an animal on the basis of sperm and egg, and sprouts and splits like a plant. It grows on the clear sea floor, where tiny corals form groups, forming “islands.” Do not look at its structure is so simple, even the immune system are not, but its chemical defensive ability is amazing. Corals live in the many holes in their secreted bones - corals. Whenever a new coral is born, “father” creates a new coral hole. With the multiplication of corals, coral bones continuously branch out like twigs and spread around. Coral can not move their own walking, can only rely on the tentacles stretched out to wait for the food from the nets. Numerous coral on coral branches are connected by a pipe, any