Q: While normal light microscopes can magnify objects up to about 1,500 times, what advanced instruments can magnify objects up to 1,000,000 times? Choices: - magnetic microscopes - micro microscopes - electric microscopes - electron microscopes A:
electron microscopes

Q: What normal bodily occurrence can cause skeletal muscles to involuntarily contract? Choices: - thinking - movement - respiration - reflexes A:
reflexes

Q: Life probably began where? Choices: - rocks - the Sun - caves - oceans A:
oceans

Q: Chains of small molecules called nucleotides make up what? Choices: - chromosomes - peptides - proteins - nucleic acids A:
nucleic acids