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

*Question*
Q: What compound has positive and negative ions? Choices: - hydrocarbon - protein - covalent - ionic A:
**Answer**
ionic

*Question*
Q: About one-fourth of the blood pumped with each heartbeat enters arteries serving what organs of digestion? Choices: - stomach - bowels - lungs - intestines A:
**Answer**
intestines

*Question*
Q: The coccyx, or tailbone, results from the fusion of four small what? Choices: - rib vertebrae - arsine vertebrae - alangulam vertebrae - coccygeal vertebrae A:
**Answer**
coccygeal vertebrae