Answer the following question given this paragraph: In a Down's cell, the liquid sodium ions are reduced at the cathode to liquid sodium metal. At the anode, liquid chloride ions are oxidized to chlorine gas. The reactions and cell potentials are shown below. Q: At the anode, liquid chloride ions are oxidized to what? Choices: - elemental gas - nitrogen gas - Heavy Gas - chlorine gas A:
chlorine gas
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Answer the following question given this paragraph: Birds have air sacs that store inhaled air and push it into the lungs like bellows. This keeps the lungs constantly filled with oxygenated air. The lungs also contain millions of tiny passages that create a very large surface area for gas exchange with the blood (see Figure below ). Q: Birds have air sacs that store inhaled air and push it into their what? Choices: - beaks - bones - abdomens - lungs A:
lungs
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Answer the following question given this paragraph: Electrons are organized into shells and subshells about the nucleus of an atom. Q: Electrons are organized into shells and subshells about the nucleus of this? Choices: - compound - molecule - element - atom A:
atom
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Answer the following question given this paragraph: The polymerase chain reaction is a way of making copies of a gene. It uses high temperatures and an enzyme to make new DNA molecules. The process keeps cycling to make many copies of a gene. Q: The polymerase chain reaction is a way of making copies of what? Choices: - an enzyme - a method - a form - a gene A:
a gene
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