Why are big, fierce animals rare?

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Why are big, fierce animals rare?
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A Food Web
Secondary Consumers
Fox
Owl
Primary Consumers
Rabbit
Mouse
Worm
Producers
Grass
Dead leaves
Oak leaves
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Calculate The photosynthetic efficiency. Gross
primary production. Net primary
production. Percentage transfer to food chains.
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Why are big, fierce animals rare?
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Autotrophic Use inorganic carbon to produce
complex biomolecules. Photoautotrophic Chemoautotr
ophic Producers in communities.
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Heterotrophic Use organic carbon to produce
complex biomolecules. Herbivore Carnivore Detritiv
ore Saprophyte Parasite Symbiont Consumers in
communities
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Light energy is absorbed by chlorophyll
which.. Is oxidised and the electrons pass
between proteins in the thylakoid
membranes, Generating ATP and Reducing NADP
while Photolysis of water supplies H ions and
electrons to replace the ones lost from
chlorophyll.
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Ribulose bi-phosphate reacts with carbon
dioxide To make GP which is reduced by NADP and
ATP To produce a carbohydrate triose phosphate
which May be converted to other carbohydrates
or Used to regenerate ribulose bi-phosphate
(needing some ATP).
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Glucose is phosphorylated with ATP and Splits
into a 3C sugar which Is oxidised to Pyruvic
acid Reducing NAD and generating Some ATP. This
is in cytoplasm.
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The pyruvate loses a C as carbon dioxide
and Reacts with coenzyme A to form acetyl
coenzyme A which Enters the mitochondria and
react with a 4C intermediate to Form a 6C acid
which is oxidised in a series of steps until the
4C intermediate is remade This produces reduced
NAD, FAD and some ATP.
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The reduced coenzymes are oxidised by Electron
transport proteins in the cristae which Pass the
electrons along a chain and generating Lots of
ATP until The H ions and electrons are picked up
by oxygen producing water.