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Questions and Answers
What is the primary role of the kidneys in mammals?
Which process do plants use to remove excess oxygen?
What term refers to animals that derive energy by eating other organisms?
Why do growing organisms require energy?
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What is essential for humans to achieve optimum nutrition?
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Which characteristic of living organisms is described by their ability to respond to changes in their environment?
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What is the primary purpose of respiration in living organisms?
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Which of the following processes is NOT a characteristic of living organisms mentioned in the content?
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Why is movement considered a key characteristic of life?
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What is the full equation for aerobic respiration?
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How do plants perform movement in response to environmental stimuli?
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Which of the following characteristics contributes to maintaining internal balance in living organisms?
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Which characteristic allows organisms to create offspring?
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What is the primary function of homeostasis in living organisms?
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Which of the following is a method by which plants reproduce?
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What type of growth occurs when a baby transitions to an adult?
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Which system in animals is responsible for coordinated responses to stimuli?
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In what way do mammals typically reproduce?
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What happens to plants when the weather gets colder?
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What is typically produced in glands found in the brain that is essential for homeostasis?
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Which statement accurately describes the growth of an adult animal?
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Study Notes
Characteristics of Living Organisms
- All living organisms share eight characteristics: movement, respiration, sensitivity, homeostasis, growth, reproduction, excretion, and nutrition.
- This is often remembered using the mnemonic Mrs. H Gren.
Movement
- Animals move their whole bodies to travel.
- Many animals move quickly to reach prey, for example, a cheetah can reach speeds of up to 70 mph.
- Plants can also move: they respond to sunlight by moving their leaves and to gravity by moving their roots.
- Plants move to maximize photosynthesis and access minerals in the soil.
Respiration
- Plants and animals use oxygen from the air to convert glucose into energy.
- This process is called aerobic respiration.
- This energy powers many life processes, including movement, growth, excretion, and reproduction.
- Aerobic respiration is represented by: oxygen + glucose → carbon dioxide + water + energy.
Sensitivity
- Living things respond to changes called stimuli.
- They detect changes through receptors.
- Plants detect changes in seasons.
- Animals detect changes in temperature and pressure.
- Organisms react accordingly.
Homeostasis
- Homeostasis refers to the ability to regulate internal body conditions.
- Animals have a nervous and hormonal system that allows for coordinated responses.
- Plants have hormones that work similarly.
- Homeostasis keeps body conditions constant, ensuring that enzymes function efficiently.
Growth
- Growth refers to an increase in cell size, number, or both.
- Growth is important for survival; for example, an adult animal is better defended against attack than an infant.
Reproduction
- All living organisms reproduce.
- Animals use either sexual or asexual reproduction to produce offspring.
- Plants use pollination or self-fertilization.
- Reproduction ensures species survival and prevents extinction.
Excretion
- Metabolic processes produce waste materials.
- These must be removed to prevent toxic buildup.
- Both plants and animals have mechanisms for excretion.
- The kidneys in mammals and the stomata in plants are examples of excretory organs.
- The kidneys remove excess urea in urine.
- Stomata remove excess oxygen.
Nutrition
- Energy is needed for growth and repair.
- Animals obtain energy from eating; this is called heterotrophy.
- Carnivores eat animals, herbivores eat plants.
- Plants create their own food through photosynthesis.
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Description
Explore the essential traits that define all living organisms through this quiz. Understand their movements, respiration processes, sensitivity to stimuli, and the fundamental characteristics that govern life. Delve into these concepts and test your knowledge with engaging questions.
