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Questions and Answers
What is the main impact of human activities on the concentration of carbon dioxide in the atmosphere?
What is the main impact of human activities on the concentration of carbon dioxide in the atmosphere?
- Having no effect on the concentration of carbon dioxide
- Decreasing the concentration of carbon dioxide
- Increasing the concentration of carbon dioxide (correct)
- Stabilizing the concentration of carbon dioxide
How can the changing concentration of carbon dioxide in the atmosphere affect living organisms?
How can the changing concentration of carbon dioxide in the atmosphere affect living organisms?
- Promoting biodiversity
- Decreasing global temperatures
- Causing ocean acidification (correct)
- Enhancing plant growth
What structures inside the cell nucleus contain DNA?
What structures inside the cell nucleus contain DNA?
- Ribosomes
- Mitochondria
- Vacuoles
- Chromosomes (correct)
In Figure 13, what is the part of the DNA molecule labelled X?
In Figure 13, what is the part of the DNA molecule labelled X?
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What type of substances are labelled A, C, G, and T in Figure 13?
What type of substances are labelled A, C, G, and T in Figure 13?
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In Figure 14, what is happening to the DNA in part Z?
In Figure 14, what is happening to the DNA in part Z?
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