Ques:Q: Mammals belong to which class of vertebrates? Read this paragraph and choose the correct option from the provided answers: Mammals are a class of endothermic vertebrates. They have four limbs and produce amniotic eggs. Examples of mammals include bats, whales, mice, and humans. Clearly, mammals are a very diverse group. Nonetheless, they share many traits that set them apart from other vertebrates. Choices: - agnathas - chondrichthyes - placoderms - endothermic A:

Ans:endothermic
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Ques:Q: Gases such as neon, argon, and krypton produce what using electroluminescence? Read this paragraph and choose the correct option from the provided answers: Another type of luminescence is called electroluminescence. In this process, a substance gives off light when an electric current passes through it. Gases such as neon, argon, and krypton produce light by this means. The car dash lights in the Figure below are produced by electroluminescence. Choices: - heat - colors - electricity - light A:

Ans:light
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Ques:Q: What type of solid has atoms arranged in a repeating pattern? Read this paragraph and choose the correct option from the provided answers: Some solids are not crystals. Glass, or the rock obsidian, are solid. However, they are not crystals. In a crystal , the atoms are arranged in a pattern. This pattern is regular and it repeats. The image below shows how the atoms are arranged in halite (table salt) ( Figure below ). Halite contains atoms of sodium and chlorine in a pattern. Notice that the pattern goes in all three dimensions. Choices: - ions - metals - hydrocarbons - crystals A:

Ans:crystals
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Ques:Q: What does the megaspore mother cell produce after meiosis division? Read this paragraph and choose the correct option from the provided answers: Watch this video (http://openstaxcollege. org/l/pollen_release) to see a cedar releasing its pollen in the wind. Female Gametophyte The female cone also has a central axis on which bracts known as megasporophylls (Figure 32.10) are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium. Choices: - four diploid megaspores - two diploid megapores - two haploid megaspores - four haploid megaspores A:

Ans:
four haploid megaspores
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