Question

1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? 2. What criteria do we use to decide whether something is alive? 3. What are outside raw materials used for by an organism? 4. What processes would you consider essential for maintaining life? 2 NUTRITION When we walk or ride a bicycle, we are using up energy. Even when we are not doing any apparent activity, energy is needed to maintain a state of order in our body. We also need materials from outside in order to grow, develop, synthesise protein and other substances needed in the body. This source of energy and materials is the food we eat.

          1.
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
2.
What criteria do we use to decide whether something is alive?
3.
What are outside raw materials used for by an organism?
4.
What processes would you consider essential for maintaining life?
2 NUTRITION
When we walk or ride a bicycle, we are using up energy. Even when we are not doing any apparent activity, energy is needed to maintain a state of order in our body. We also need materials from outside in order to grow, develop, synthesise protein and other substances needed in the body. This source of energy and materials is the food we eat.

1.
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
2.
What criteria do we use to decide whether something is alive?
3.
What are outside raw materials used for by an organism?
4.
What processes would you consider essential for maintaining life?
2 NUTRITION
When we walk or ride a bicycle, we are using up energy. Even when we are not doing any apparent activity, energy is needed to maintain a state of order in our body. We also need materials from outside in order to grow, develop, synthesise protein and other substances needed in the body. This source of energy and materials is the food we eat.

Added by Carla D.

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