Which of these is an amphibian? A. Toad B. Lizard C. Rabbit D. Pig 相关知识点: 试题来源: 解析 A。蟾蜍是两栖动物,两栖动物幼体生活在水中,用鳃呼吸,成体大多生活在陆地上,也可在水中游泳,用肺呼吸,皮肤可辅助呼吸。蜥蜴是爬行动物,兔子是哺乳动物,猪是哺乳动物。
Which animal below is an amphibian? a. a lizard b. a snake c. a sand dollar d. a frog Amphibians: Amphibians are chordate tetrapod animals that are ectodermic. The amphibian life cycle starts in water with a gill-breathing larval stage and progresses into a...
Antarctica as a Center of Origin of Birds Archaeornis). An anatomical feature, characteristic of birds, and not reported for either of these forms, is a well-developed sternum (Wetmore, 1951). Since this is an important avian characteristic, neither of these bird-like animals sh... FH Glen...
this “amphibian crisis,” which, in their view, is an indicator of general and catastrophic environmental (10) degradation due to human activity. To evaluate these claims, it is useful to make a preliminary distinction that is far too often ignored. A declining population should not be confuse...
Small clever animals scattered in various parts of the world, they too 翻译结果4复制译文编辑译文朗读译文返回顶部 The first of these small plant propagation so that the ocean is filled with oxygen, and this has encouraged the development of early shellfish and fish. After the awful land animals...
To determine which statement is not true among the given options, we will analyze each statement step by step.Step 1: Understand the Sets Let’s define two sets: - Let \( A \) be a set of elements. - Let \( B \) be another set
They had no brain, and therefore none of these animals without a backbone has ever been of much importance. They are wonderfully made but differ so widely that it is really impossible to arrange them in a simple order。 However, those who study the different kinds of backboned animals find...
We propose that single cells (blastomeres) isolated from early stage invertebrate, amphibian, or fish embryos are ideal model systems for the development of technologies for single cell analysis. For these embryos, although cell cleavage is not exactly symmetric, the content per blastomere decreases ...
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Not invaders from space, but plants! You might not think of plants as dangerous, but in this case they are threatening nature’s delicate food chain. The invaders are plants brought here from other countries to make gardens and yards look pretty. Ever since people started to arrive on Americ...