Problem:OPTIONS:
- sunlight
- radioactive
- magnetic
- thermal

Q: Convection generally involves the transfer of what type of energy? A:
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A: thermal

Problem:OPTIONS:
- an photon
- an electron
- a neutron
- an ion

Q: What is an atom or group of bonded atoms that has a positive or negative charge? A:
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A: an ion

Problem:OPTIONS:
- chromosomes
- electrons
- cells
- ribosomes

Q: The job of the nucleolus is to build what? A:
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A: ribosomes

Problem:OPTIONS:
- circulatory system
- pulmonary system
- digestion system
- immune system

Q: An antigen is a macromolecule that reacts with components of what? A:
****
A:
immune system