How Are Animals Different?动物有何不同？

I-7 / 007

How Are Animals Different?

Many different animals live on this earth. Some live in the water. Some live above, on, or under the land. Some fly in the air. Some animals are large, and some are small. Some are so small that you need a microscope to see them. Others are larger than your automobile or even a school bus! Each kind must have the right kind of environment, food, water, and air to live, grow, and multiply. So you see, each kind of animal is like every other kind, and each has the same basic needs. But the animals are different in many ways.

Did you say they have different sizes, shapes, or colors? If you did, you are right. The nature did make animals of different sizes, shapes, and colors. Did you say they have different patterns or designs? If you did, you are right. The nature did make animals that have different designs or patterns. Did you say they are different in where they live? If you did, you are right. Animals are not able to live anywhere. Their environment must be just right for them if they are to survive. Did you say they are different in how they breathe? If you did, you are right because animals do not all breathe in the same ways. Did you say they are different in their body coverings? If you did, you are right because they do not all have the same kind of body coverings. Did you say they are different in how they have their babies? If you did, you are right again. Some animals multiply by dividing into two parts. These animals are so small that you need a microscope to observe them. Some animal babies hatch from eggs, and other animal babies are born alive.

Animals are different in many ways.

必背词汇

练 习

Complete the following chart.

Place a check in the box that tells what is true for each of the vertebrates.

译 文

动物有何不同?

许多不同的动物都生活在地球上。有些生活在水中，有些生活在地面附近或地表，有些生活在地下，也有些飞翔在空中。有些动物体形很大，有些体形很小。有些动物非常小，小到你需要用显微镜才能看到它们；而有些则比你的汽车大，甚至比校车还要大！每种动物都必须要有适宜的环境，以及充足的食物、水和空气才能够生存、生长、繁殖。因此，你瞧，每种动物和其他种类的动物是相似的，它们都有一样的基本需求。但是这些动物在很多方面又是不同的。

你会说它们有不同的大小、形状或颜色吗？如果会，那就对了。大自然确实创造出了不同大小、形状及颜色的动物。你会说它们有不同的样式或风格吗？如果会，那就对了。大自然确实创造了不同样式及风格的动物。你会说它们生长在不同的环境中吗？如果会，那就对了。动物不是在世界各地均能生存的，它们必须在适宜的环境中才能够存活。你会说它们呼吸的方式不同吗？如果会，那就对了。因为并不是所有的动物都是用同一种方式呼吸的。你会说它们的皮毛不同吗？如果会，那就对了。因为不是所有的动物都拥有相同的皮毛。你会说它们繁殖的方式不同吗？如果会，那就又对了。有些动物需要将身体分裂成两部分才能够繁殖。这些动物的体形小到你需要用显微镜才能观察到它们。有些动物宝宝是从蛋壳中孵化出来的，有些则是分娩出生的。

动物在许多方面都是不同的。

练 习

完成下列表格。

在下列表格中做出判断，在符合的脊椎动物特征栏内打勾。