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Questions and Answers
What is the purpose of the maintenance processes mentioned in the text?
What is the purpose of the maintenance processes mentioned in the text?
- To increase body size
- To produce energy
- To control the environment
- To prevent damage and break-down (correct)
What is the primary source of energy for organisms mentioned in the text?
What is the primary source of energy for organisms mentioned in the text?
- Water
- Sunlight
- Food (correct)
- Air
Why do organisms need to break down the outside sources of energy?
Why do organisms need to break down the outside sources of energy?
- To prevent damage and break-down
- To increase body size
- To convert to uniform energy source (correct)
- To control the environment
What type of molecules do most food sources for organisms on Earth consist of?
What type of molecules do most food sources for organisms on Earth consist of?
What type of chemical reactions are commonly used to break down molecules in organisms?
What type of chemical reactions are commonly used to break down molecules in organisms?
Where do many organisms get oxygen required for oxidising-reducing reactions?
Where do many organisms get oxygen required for oxidising-reducing reactions?
Why might a single-celled organism not require specific organs for gas exchange?
Why might a single-celled organism not require specific organs for gas exchange?
In multi-cellular organisms, why is simple diffusion insufficient to meet the needs of all cells?
In multi-cellular organisms, why is simple diffusion insufficient to meet the needs of all cells?
Why is a transportation system needed in multi-cellular organisms for carrying food and oxygen?
Why is a transportation system needed in multi-cellular organisms for carrying food and oxygen?
What is the process called when waste by-products are removed from the body and discarded outside?
What is the process called when waste by-products are removed from the body and discarded outside?
Why do multi-cellular organisms need specialized tissues for functions like uptake of food and oxygen?
Why do multi-cellular organisms need specialized tissues for functions like uptake of food and oxygen?
What happens when chemical reactions in an organism create by-products that are harmful to cells?
What happens when chemical reactions in an organism create by-products that are harmful to cells?
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