Q: Where does digestion begin? Choices: - spicule cavity - excretory system - oral cavity - gastrovascular cavity A:
gastrovascular cavity

Q: A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade? Choices: - volcano fall - volcanic summer - volcano spring - volcanic winter A:
volcanic winter

Q: Q: What do microbes use to make food? Choices: - nitrogen - sunlight - plants - chemicals A:
A: chemicals

Question: Q: The chemistry of each element is determined by its number of what? Choices: - nuclei and neutrons - protons and neutrons - electrons and neutrons - protons and electrons A:
Answer: protons and electrons

*Question*
Q: Functional groups are groups of atoms that occur within molecules and confer specific chemical properties to those molecules. they are found along the "carbon backbone" of what? Choices: - inorganic molecules - functional molecules - micromolecules - macromolecules A:
**Answer**
macromolecules

*Question*
Q: What links together to form long polymeric chains? Choices: - genes - lipids - peptides - nucleotides A:
**Answer**
nucleotides