Answer the following question given this paragraph: Aerobic prokaryotes live in habitats with oxygen. Anaerobic prokaryotes live in habitats without oxygen. Prokaryotes may also be adapted to habitats that are hot, moderate, or cold in temperature. Q: Anaerobic prokaryotes can live without what compound in their environment (it's a compound that people do need to live)? Choices: - carbon - Hydrogen - nitrogen - oxygen A:
oxygen
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Answer the following question given this paragraph: The fluffy white fibers on this plant look like cotton balls because that's what they are. The plant is a cotton plant, and the fibers are used to make cotton fabric. Cotton fibers consist of one of the most common compounds on Earth: cellulose. Cellulose is a biochemical compound found in all plants. It belongs to the class of biochemical compounds called carbohydrates. Q: What is one of the most common biochemical compounds on earth and is found in all plants? Choices: - carbon dioxide - hydrogen - sulfur - cellulose A:
cellulose
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Answer the following question given this paragraph: All chemical changes involve a transfer of energy. When zinc reacts with hydrochloric acid, the test tube becomes very warm as energy is released during the reaction. Some other reactions absorb energy. While energy changes are a potential sign of a chemical reaction, care must be taken to ensure that a chemical reaction is indeed taking place. Physical changes also involve a transfer of energy. Melting of a solid absorbs energy, while the condensation of a gas releases energy. The only way to be certain that a chemical reaction has taken place is to test the composition of the substances after the change has taken place to see if they are different from the starting substances. Q: All chemical changes involve a transfer of what? Choices: - hydrogen - pressure - nitrogen - energy A:
energy
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Answer the following question given this paragraph: Although most of a cell's DNA is contained in the cell nucleus, mitochondria have their own DNA. Mitochondria also have the machinery to manufacture their own RNAs and proteins. The human mitochondrial DNA sequence has 16,569 base pairs encoding 37 total genes: 22 tRNA genes, 2 rRNA genes, and 13 peptide genes. The 13 mitochondrial peptides in humans are integrated into the inner mitochondrial membrane, along with proteins encoded by nuclear genes. Q: Where is most of the cell's dna contained? Choices: - vacuole - epidermis - cell membrane - nucleus A:
nucleus
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