nutrition definitions

• Autotrophic

  makes complex organic molecules from simple inorganic ones.
• Photoautotrophic

  use light as a source of energy for synthesis of nutrients.
• Chemoautotrophic

  Oxidise inorganic molecules to provide energy for synthesis of nutrients
• Heterotrophic

  consume complex organic food molecules
• Saprophytic

  external digestion of food using secretion of enzymes followed by absorption of products of digestion into organism e.g. fungi
• Holozoic

  internal digestion of nutrients. Involves ingestion, absorption, assimilation + egestion.
• Parasite

  A species that lives on (ecto) or in (endo) a host + obtains nutrients at the expense of the host.