Podcast
Questions and Answers
What is one way we tend to think of as common evidence for being alive?
What is one way we tend to think of as common evidence for being alive?
Why are molecular movements necessary for life?
Why are molecular movements necessary for life?
What is one characteristic that defines living organisms?
What is one characteristic that defines living organisms?
What happens if order breaks down in living organisms?
What happens if order breaks down in living organisms?
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What is a characteristic of viruses?
What is a characteristic of viruses?
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What do cells have in them?
What do cells have in them?
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Why do living creatures need to move molecules around?
Why do living creatures need to move molecules around?
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What is an example of a maintenance process in living organisms?
What is an example of a maintenance process in living organisms?
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What is the primary function of life processes in living organisms?
What is the primary function of life processes in living organisms?
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What is the source of energy for life processes?
What is the source of energy for life processes?
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What type of molecules do most food sources consist of?
What type of molecules do most food sources consist of?
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What is the purpose of oxidising-reducing reactions in the body?
What is the purpose of oxidising-reducing reactions in the body?
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What is the term for the process of acquiring oxygen from outside the body?
What is the term for the process of acquiring oxygen from outside the body?
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What is the purpose of nutrition in living organisms?
What is the purpose of nutrition in living organisms?
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What is unique about single-celled organisms?
What is unique about single-celled organisms?
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Why do living organisms need to break down or build up energy sources from outside the body?
Why do living organisms need to break down or build up energy sources from outside the body?
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Study Notes
Characteristics of Life
- Visible movement is not enough to determine if something is alive, as plants can be alive without visible growth and animals can breathe without movement.
- Molecular movement is necessary for life, as it is required for the maintenance of living structures.
Importance of Molecular Movement
- Molecular movement is necessary to repair and maintain the organized structure of living organisms, which is susceptible to breaking down due to environmental factors.
- This movement allows living organisms to maintain their structure and prevent damage and breakdown.
Life Processes
- Life processes refer to the maintenance functions of living organisms that continue even when they are not performing any specific activity.
- These processes require energy, which comes from outside the body of the organism, and involve the transfer of energy from food sources to the inside of the body.
Nutrition
- Nutrition is the process of transferring energy from outside the body to the inside.
- Energy sources can be varied, but most are carbon-based, depending on the complexity of the organism.
- Different organisms use different nutritional processes to acquire energy.
Respiration
- Respiration is the process of acquiring oxygen from outside the body and using it to break down food sources for cellular needs.
- Oxidising-reducing reactions are common chemical means of breaking down molecules, and oxygen is often sourced from outside the body.
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Description
Learn how to identify living beings, including animals and plants, based on their characteristics and processes.
