Ques:Q: In multicellular organisms, specialized cells may be organized into what, which in turn may be organized into organs? Choices: - nutrients - muscles - blood cells - tissues A:

Ans:tissues
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Ques:Q: Different isotopes of an element have different mass numbers because they have different numbers of what? Choices: - protons - electrons - nuclei - neutrons A:

Ans:neutrons
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Ques:Q: What can be looked at to see a record of how horses evolved? Choices: - erosion records - carbon dating - pattern records - fossil records A:

Ans:fossil records
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Ques:Q: What type of cells are gametes? Choices: - cardiac - immune - proteins - reproductive A:

Ans:
reproductive
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