12.16 登记分类
章节大纲
-
With so many possible colors, how would a chameleon be classified?
::可能有这么多颜色 变色龙怎么分类?Chameleons are a distinctive and highly specialized type of lizard. They are distinguished partly by their parrot-like feet, their separately mobile and stereoscopic , their very long, highly modified, and rapidly extrudable tongues, crests or horns on their distinctively shaped heads, and the ability of some to change color. But there are approximately 160 of chameleons. So how are they classified?
::变色龙是一种独特和高度专业化的蜥蜴类型,其部分区别在于它们的鹦鹉般的脚,它们分开的移动和立体形,它们的长长的、高度改造的和快速发光的舌头、尖峰或角,以及某些人改变颜色的能力。但有大约160个变色龙。它们是如何分类的呢?Classification of Reptiles
::爬行动物分类分类There are more than 8,200 living species of , with the majority being snakes or lizards. They are commonly placed in four different orders. The four orders are described in Table .
::有8,200多种生物种类,大多数为蛇或蜥蜴,通常按四种不同顺序排列。Order Characteristics Example : crocodiles, alligators, caimans, gharials They have four sprawling legs that can be used to gallop; they replace their teeth throughout life; they have strong jaws and a powerful bite; they have a more advanced brain and greater intelligence than other reptiles; they have a four-chambered heart. caiman
::caiman 子天体: tuataras They are the least specialized of all living reptiles; their brain is very similar to the brain; they have a three-chambered heart, but it is more primitive than the heart of other reptiles. tuatara
::塔塔纳a: lizards, snakes Lizards: most have four legs for running or climbing, and they can also swim; many change color when threatened; they have a three-chambered heart.
::蜥蜴:大部分人有四条腿可以跑或爬,他们也可以游泳;许多受到威胁时会改变颜色;他们有三组心脏。Snakes: they do not have legs, although they evolved from a tetrapod ancestor ; they have a very flexible jaw for swallowing large prey whole; some inject venom into their prey through fangs; they have a three-chambered heart.
::蛇:它们没有腿,尽管它们从四肢祖先进化而来;它们有一个非常灵活的下巴,用来吞下整个大猎物;一些通过尖牙将毒液注射到猎物中;它们有一个三组心脏。lizard
::蜥蜴Testudines : , tortoises, terrapins They have four legs for walking; they have a hard shell covering most of their body; they have a three-chambered heart. terrapin
::Summary
::摘要-
There are more than 8,200 living species of reptiles, and they are placed in four orders: Crocodilia, which includes crocodiles and alligators; Sphenodontia, or tuataras; Squamata, which includes lizards and snakes; and Testudines, such as turtles and tortoises.
::爬行动物有8,200多种生物物种,按四个顺序排列:鳄鱼,包括鳄鱼和鳄鱼;松鼠,或松鼠;水俣,包括蜥蜴和蛇;和睾丸,如海龟和乌龟。
Review
::回顾-
Compare and contrast crocodilians with other orders of reptiles.
::将鳄鱼与其他爬行动物的订单进行比较和对比。
-
There are more than 8,200 living species of reptiles, and they are placed in four orders: Crocodilia, which includes crocodiles and alligators; Sphenodontia, or tuataras; Squamata, which includes lizards and snakes; and Testudines, such as turtles and tortoises.
