Twins contain what to look identical?
a. carbohydrates
b. lipids
c. nucleic acids...
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How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?
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Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.
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Which spheres are involved when sedimentary rocks formed from parts of seashells at the bottom of the ocean? a.) biosphere, atmosphere, geosphereb.) geosphere, hydrosphere, biosphere c.) geosphere, exosphere, hydrosphered.) hydrosphere, biosphere, atmosphere
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