Ques:Q: Many objects have color because they contain what? Choices: - solvents - vitamins - salts - pigments A:

Ans:pigments
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Ques:Q: Pacemaker cells stimulate the spontaneous contraction of cardiac muscle as a functional unit, called a what? Choices: - coenocyte - tapetum - adipocytes - syncytium A:

Ans:syncytium
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Ques:Q: How much space a surface covers is known as what? Choices: - Flatness - Lenght - Height - area A:

Ans:area
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Ques:Q: What do you call compounds whose properties are different because their atoms are bonded together in different arrangements? Choices: - isotopes - mixtures - ionic compounds - isomers A:

Ans:
isomers
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