Understanding Nutrition: Autotrophs and Heterotrophs

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Questions and Answers

The process by which autotrophs take in substances from the outside is called:

  • Respiration
  • Photosynthesis (correct)
  • Transpiration
  • Digestion

In what form are carbohydrates stored in plants?

  • Starch (correct)
  • Fats
  • Proteins
  • Glucose

What type of organisms are included in heterotrophic nutrition?

  • Algae
  • Animals and fungi (correct)
  • Bacteria
  • Plants

What is the general requirement for energy and materials in organisms?

<p>Growth and development (A)</p>
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What is the initial step in heterotrophic nutrition?

<p>Ingestion of food (D)</p>
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Which of the following is broken down into simpler substances during digestion?

<p>Complex substances (C)</p>
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What captures light energy during photosynthesis?

<p>Chlorophyll (C)</p>
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What is the process of obtaining food called?

<p>Nutrition (B)</p>
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How do single-celled organisms obtain food?

<p>By diffusion across the cell surface (C)</p>
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What organic compounds are used immediately by the autotrophs?

<p>Carbohydrates (C)</p>
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Flashcards

How do living things get their food?

The general requirement for energy and materials is common in all organisms, but it is fulfilled in different ways.

Autotrophic Nutrition

Autotrophic nutrition occurs when organisms take in substances from the outside and convert them into stored forms of energy.

Autotrophic Nutrition

This material is taken in the form of carbon dioxide and water which is converted into carbohydrates in the presence of sunlight and Chlorophyll.

Carbohydrates are for

Carbohydrates are utilised for providing energy to the plant.

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Starch is

Carbohydrates which are not used immediately are stored in the form of starch.

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Heterotrophic Organisms

Heterotrophic organisms include animals and fungi.

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Study Notes

Nutrition

  • Needed when walking or riding a bicycle as energy is used.
  • Organisms need energy from outside the body for growth, development, and synthesizing proteins.
  • Food is the source of energy and materials for the body.

How do living things get their food?

  • The general requirement for energy and materials is common in all organisms.
  • Food material is obtained from inorganic sources, like carbon dioxide and water.
  • Autotrophs use simple substances.
  • Heterotrophs use complex substances, broken down into simpler ones before usage.
  • Heterotroph survival is dependent on autotrophs directly/indirectly.
  • Heterotrophic organisms include animals and fungi.

Autotrophic Nutrition

  • It is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy.
  • Carbohydrates are used for providing energy to the plant.
  • Carbohydrates which are not used immediately are stored in the form of starch, which serves as an internal energy reserve to be used by the plant.
  • Energy derived from food is stored in the body in the form of glycogen.

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