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Questions and Answers
What is the primary function of ATP in living organisms?
What is the primary function of ATP in living organisms?
Which type of respiration produces the most energy?
Which type of respiration produces the most energy?
Why is it unlikely for two species to occupy the same niche?
Why is it unlikely for two species to occupy the same niche?
In which part of the plant cell does photosynthesis occur?
In which part of the plant cell does photosynthesis occur?
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What causes a decrease in population growth according to the principle of limiting factors?
What causes a decrease in population growth according to the principle of limiting factors?
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What is the primary function of proteins in living organisms?
What is the primary function of proteins in living organisms?
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Which of the following is true about anaerobic respiration?
Which of the following is true about anaerobic respiration?
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What is the role of stomata in plants?
What is the role of stomata in plants?
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Which of the following is an example of an autotroph?
Which of the following is an example of an autotroph?
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Which macromolecule is primarily responsible for storing genetic information?
Which macromolecule is primarily responsible for storing genetic information?
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Which of the following statements about fermentation is correct?
Which of the following statements about fermentation is correct?
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What is the independent variable in an experiment?
What is the independent variable in an experiment?
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What is the primary component in the pH scale that determines acidity?
What is the primary component in the pH scale that determines acidity?
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In a food chain, approximately what percentage of energy is passed from one trophic level to the next?
In a food chain, approximately what percentage of energy is passed from one trophic level to the next?
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Which of the following describes a decomposer?
Which of the following describes a decomposer?
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What is the definition of homeostasis?
What is the definition of homeostasis?
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Study Notes
Scientific Method
- A systematic approach to problem-solving
- Involves observing, questioning, forming hypotheses, experimenting, and analyzing results
- Variables: factors that can alter the outcome of an experiment
- Independent variable: manipulated by the researcher
- Dependent variable: affected by the independent variable and is measured
- Controlled variables: kept constant to avoid affecting the results
Biological Systems
- Homeostasis a state of balance within an organism
- Examples of homeostasis in the human body:
- regulating body temperature
- maintaining blood sugar levels
Matter and Elements
- Essential elements for all living things:
- Carbon
- Hydrogen
- Oxygen
- Nitrogen
- Water (H₂O) is the most abundant compound in living organisms
pH
- pH scale measures acidity and basicity
- Substances below pH 7 are acidic, above pH 7 are basic, and at pH
- A pH of 7 is neutral
- Differences in pH values represent different hydrogen ion (H+) concentrations, and a change of one number represents a tenfold difference
Macromolecules
- Large molecules essential for life's processes
- Examples:
- Carbohydrates: primary source of energy
- Lipids: store energy, insulation
- Proteins: regulate cell processes, and structural support
- Nucleic acids: store and transmit genetic information
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Description
Test your knowledge on the scientific method, biological systems, and the properties of matter. This quiz covers key concepts such as homeostasis, variables in experiments, and the pH scale. Perfect for students interested in life sciences and chemistry.
