Ques:Q: Mammals belong to which class of 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? 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? Choices: - ions - metals - hydrocarbons - crystals A:

Ans:crystals
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Ques:Q: What does the megaspore mother cell produce after meiosis division? Choices: - four diploid megaspores - two diploid megapores - two haploid megaspores - four haploid megaspores A:

Ans:
four haploid megaspores
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