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Questions and Answers
What is the cell theory's first statement regarding living things?
What is the cell theory's first statement regarding living things?
What ensures the genetic continuity from generation to generation?
What ensures the genetic continuity from generation to generation?
In which type of reproduction do organisms duplicate an identical cell?
In which type of reproduction do organisms duplicate an identical cell?
What do autotrophs use to produce their own glucose?
What do autotrophs use to produce their own glucose?
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Which molecule is primarily responsible for carrying genetic information?
Which molecule is primarily responsible for carrying genetic information?
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What is the term for the sum of all chemical reactions occurring within an organism?
What is the term for the sum of all chemical reactions occurring within an organism?
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Which of the following is NOT a characteristic of life?
Which of the following is NOT a characteristic of life?
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Which group of organisms cannot make their own glucose?
Which group of organisms cannot make their own glucose?
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What is necessary for a unicellular organism to grow and develop?
What is necessary for a unicellular organism to grow and develop?
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Which process must a multicellular organism undergo to grow and develop?
Which process must a multicellular organism undergo to grow and develop?
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What is the correct sequence of biological organization from smallest to largest?
What is the correct sequence of biological organization from smallest to largest?
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How do all living things respond to their environment?
How do all living things respond to their environment?
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What is homeostasis in the context of living organisms?
What is homeostasis in the context of living organisms?
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Who proposed the mechanism of natural selection?
Who proposed the mechanism of natural selection?
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What does fitness refer to in biological terms?
What does fitness refer to in biological terms?
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Which of the following statements about evolution is true?
Which of the following statements about evolution is true?
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What component is critical for autotrophs to produce their own glucose during photosynthesis?
What component is critical for autotrophs to produce their own glucose during photosynthesis?
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What is the primary distinction between unicellular and multicellular organisms?
What is the primary distinction between unicellular and multicellular organisms?
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What do heterotrophs require to acquire energy?
What do heterotrophs require to acquire energy?
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What must unicellular organisms increase in order to grow and develop?
What must unicellular organisms increase in order to grow and develop?
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Which of the following best describes the term 'metabolism'?
Which of the following best describes the term 'metabolism'?
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What process must multicellular organisms undergo to ensure growth?
What process must multicellular organisms undergo to ensure growth?
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How can genetic information be classified in living organisms?
How can genetic information be classified in living organisms?
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How do all living things respond to changes in their environment?
How do all living things respond to changes in their environment?
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What term refers to the ability of an organism to maintain a stable internal environment?
What term refers to the ability of an organism to maintain a stable internal environment?
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Which type of reproduction involves the combination of sperm and egg?
Which type of reproduction involves the combination of sperm and egg?
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What is the purpose of reproduction in living organisms?
What is the purpose of reproduction in living organisms?
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What mechanism did Charles Darwin propose to explain evolution?
What mechanism did Charles Darwin propose to explain evolution?
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What characteristic distinguishes viruses from living organisms?
What characteristic distinguishes viruses from living organisms?
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What is indicated by the term 'fitness' in biological terms?
What is indicated by the term 'fitness' in biological terms?
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What term describes the changes that living organisms undergo over time?
What term describes the changes that living organisms undergo over time?
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Which level of organization is the most complex for living organisms?
Which level of organization is the most complex for living organisms?
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Study Notes
Characteristics of Life
- Living things exhibit similar characteristics, whether simple or complex
- All living things are composed of cells
- Cell Theory:
- Living organisms are made of one or more cells
- All cells originate from pre-existing cells
- The cell is the basic unit of life
- All living things reproduce
- Reproduction creates offspring, ensuring genetic continuity
- Two types of reproduction: sexual (involving sperm and egg) and asexual (duplication of a cell)
- Genetic information is encoded in DNA, a molecule of deoxyribonucleic acid.
- Viruses can have DNA or RNA (in retroviruses) as their genetic material, but viruses do not exhibit all characteristics of life and are thus classified as non-living.
- All living things require and use energy:
- Autotrophs (e.g., plants) create their own energy (glucose) through photosynthesis using chlorophyll and sunlight.
- Heterotrophs (e.g., animals) obtain energy by consuming other organisms.
- Energy usage is facilitated by chemical reactions known as metabolism.
- All living things grow and develop
- Unicellular organisms increase in size by gaining more cytosol
- Multicellular organisms grow by cell division and specialization into tissues.
- Living things are organized on multiple levels, from atoms to organ systems
- Living beings react to changes ('stimuli') in their surroundings
- Responses can adjust external or internal environments.
- Homeostasis (constant internal state) is maintained through these responses.
- Living things adapt and evolve through time.
- Natural selection is the process by which traits that promote survival and reproduction are favoured.
- Random mutations in DNA create variability in traits that result in differences amongst individuals.
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Description
Explore the fundamental characteristics that define living organisms in this quiz. Understand concepts such as cell theory, reproduction, and energy use in both autotrophs and heterotrophs. Test your knowledge on how these traits are essential for life.
