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life processes — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencelife processes2 Marks
Question
How do living things get their food?
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Answer

  • The requirement for energy and materials is common in all organisms.
  • On the basis of the mode of nutrition, organisms are of two types:
  • $(1)$ Autotrophs:
  • These organisms use simple food material obtained from inorganic sources in the form of carbon dioxide and water.
  • Green plants and some bacteria are autotrophs.
  • $(2)$ Heterotrophs:
  • These organisms utilise complex substances from other organisms and broken down into simpler ones.
  • To achieve this, organisms use bio-catalysts called enzymes.
  • The heterotrophs survival depends directly or indirectly on autotrophs.
  • Animals and fungi are heterotrophs.

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