Answer the following question given this paragraph: Atomic emission spectra are produced when excited electrons return to ground state. Q: Atomic emission spectra are produced when excited electrons return to what state? Choices: - orbital state - work state - side state - ground state A:
ground state

Answer the following question given this paragraph: Many mutations are not caused by errors in replication. Mutations can happen spontaneously, and they can be caused by mutagens in the environment. Some chemicals, such as those found in tobacco smoke, can be mutagens. Sometimes mutagens can also cause cancer. Tobacco smoke, for example, is often linked to lung cancer. Q: What can happen spontaneously or as a result of mutagens in the environment? Choices: - lesions - combustion - traits - mutations A:
mutations

Answer the following question given this paragraph: Nucleic acids are biochemical compounds that include RNA (ribonucleic acid) and DNA (deoxyribonucleic acid). Nucleic acids consist of chains of small molecules called nucleotides. Nucleotides are the monomers of nucleic acids. A nucleotide is shown in Figure below . Q: What consist of chains of small molecules called nucleotides? Choices: - Atomic acids - structural acids - nitrous acids - nucleic acids A:
nucleic acids

Answer the following question given this paragraph: Q: In flowering plants, male gametophytes are in grains of what? Choices: - viruses - bacteria - nitrogen - pollen A:
pollen