Question

Q1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
Ans. In multicellular organisms all the cells may not be in direct contact with the surrounding environment. Hence diffusion will not meet all the requirements of all the cells.
Q2. What criteria do we use to decide whether something is alive?
Ans. Movement in response to external stimuli, breathing, growth etc.
Q3. What are outside raw materials used for by an organism?
Ans. Outside raw materials are used for maintenance and sustenance of life by an organism.
Q4. What processes would you consider essential for maintaining life?
Ans. All processes that perform the maintenance function of living organisms are called life processes. All life processes are essential for maintaining life.
Q5. What are the differences between autotrophic nutrition and heterotrophic nutrition?
Ans.
Autotrophic Nutrition Heterotrophic Nutrition
1. Food is made from inorganic components. Food is obtained from organic components
2. Chlorophyll and sunlight is required. Chlorophyll and sunlight is not required.
3. Photosynthesis or chemosynthesis takes place. These processes do not occur.
4. It occurs in green plants and some bacteria. It occurs in animals and insectivorous plants​

Answer 1

Answer:

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Explanation:

1.

Q1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

Ans. In multicellular organisms all the cells may not be in direct contact with the surrounding environment. Hence diffusion will not meet all the requirements of all the cells.

Q2. What criteria do we use to decide whether something is alive?

Ans. Movement in response to external stimuli, breathing, growth etc.

Q3. What are outside raw materials used for by an organism?

Ans. Outside raw materials are used for maintenance and sustenance of life by an organism.

Q4. What processes would you consider essential for maintaining life?

Ans. All processes that perform the maintenance function of living organisms are called life processes. All life processes are essential for maintaining life.

Q5. What are the differences between autotrophic nutrition and heterotrophic nutrition?

Ans.

Autotrophic Nutrition Heterotrophic Nutrition

1. Food is made from inorganic components. Food is obtained from organic components

2. Chlorophyll and sunlight is required. Chlorophyll and sunlight is not required.

3. Photosynthesis or chemosynthesis takes place. These processes do not occur.

4. It occurs in green plants and some bacteria. It occurs in animals and insectivorous plants

Answer 2

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