Q: When animals get rid of their gaseous waste, what is exhaled through their mouth and nose? Choices: - oxygen - carbon monoxide - hydrogen - carbon dioxide A:
carbon dioxide

Q: What is the process by which organisms change in small ways over time? Choices: - spontaneous mutation - natural selection - adaptation - microevolution A:
microevolution

Q: Q: Hydrogen chloride contains one atom of hydrogen and one atom of what? Choices: - magnesium - calcium - nitrogen - chlorine A:
A: chlorine

Question: Q: Most hydrozoa have both polyp and what forms in their life cycle? Choices: - hydra - globular - polypoid - medusa A:
Answer: medusa

*Question*
Q: What holds together the small molecules called nucleotides which make up nucleic acids? Choices: - permanent bonds - dissonance bonds - curvature bonds - covalent bonds A:
**Answer**
covalent bonds

Q: But a point mutation can also change a codon for an amino acid into a what? Choices: - axon - exon - stop mutation - stop codon A:
stop codon