Ques:Q: What protein is produced when a plasma cell is stimulated by antigens? Choices: - collagen - dystrophin - keratin - immunoglobulin A:

Ans:immunoglobulin
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Ques:Q: What often involves the loss of hydrogen, the gain of oxygen, or the loss of electrons? Choices: - decomposition - precipitation - carbonation - oxidation A:

Ans:oxidation
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Ques:Q: What phylum includes snails, squids and clams? Choices: - protozoa - cnidaria - porifera - mollusca A:

Ans:mollusca
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Ques:Q: What is the name of the layer above the mesosphere? Choices: - exosphere - lithosphere - intersphere - thermosphere A:

Ans:
thermosphere
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