Biology Unit 2 - Adaptations for Nutrition Definitions

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  • Created by: Tasha.L
  • Created on: 02-05-16 17:51
Autotrophic
Organisms that make their own food from two simple inorganic raw materials, carbon dioxide and water.
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Photoautotrophic
Organisms that use light as an energy source and perform photosynthesis.
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Chemoautotrophic
Organisms that use energy from chemical reactions, e.g. all prokaryotes.
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Heterotrophic Organisms
Organisms that cannot make their own food, so instead consume complex organic molecules produced by autotrophs. They are consumers.
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Saprotrophic Nutrition
Organisms derive energy and raw materials for growth from extracellular digestion of dead and decaying matter.
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Parasitic Nutrition
Organisms that obtain nutrients from other living organism, the host
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Holozoic Nutrition
The feeding method of most animals, involving ingestion, digestion, absorption and egestion. This occurs internally in a specialised digestive system.
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Parasite
An organism that lives and feeds off another organism, causing it harm.
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Mechanical digestion
The cutting and crushing of food by teeth or the muscle contractions of the gut wall.
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Chemical Digestion
The secretion of digestive enzymes, such as bile and stomach acid, to digest food.
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Serosa
Tough connective tissue protecting the gut wall. It reduces friction with abdominal organs.
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Endopeptidases
Peptidases that hydrolyse the bonds within a protein molecule.
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Exopeptidases
Peptidases that hydrolyse the bonds at the ends of polypeptides.
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Ruminant
A cud-chewing herbivore with mutualistic microbes in its rumen.
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Mutualism
The strong association between two different members of different species, where both benefit.
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Other cards in this set

Card 2

Front

Organisms that use light as an energy source and perform photosynthesis.

Back

Photoautotrophic

Card 3

Front

Organisms that use energy from chemical reactions, e.g. all prokaryotes.

Back

Preview of the back of card 3

Card 4

Front

Organisms that cannot make their own food, so instead consume complex organic molecules produced by autotrophs. They are consumers.

Back

Preview of the back of card 4

Card 5

Front

Organisms derive energy and raw materials for growth from extracellular digestion of dead and decaying matter.

Back

Preview of the back of card 5
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