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iGCSE Edexcel Ecology and Brain - Powerpoint

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- sections included - ecology - carbon cycle nitrogen cycle energy pyramids and biomass pyramids feeding relationships sampling eutrophication brain - nervous system endocrine system neurones reflex arc glucose control hormones eyes

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BIOLOGY SUMMARY
ECOLOGY AND BRAIN

,ECOLOGY AND THE
ENVIRONMENT

, Species
• a group of organisms that are able to breed together to make fertile offspring

Habitat
• the place where an organism lives

MAIN Population
• all the organisms of one species in a habitat
DEFINITIONS Community
• all the different species in a habitat

Ecosystem
• all the organisms living in a particular area PLUS all the non-living (abiotic) co
temperature)
Biodiversity
• the variety of different species of organisms on Earth or within an ecosystem

, BIODIVERSITY AND ECOSYSTEMS


High biodiversity ensures that Human activities are reducing
the ecosystems are stable biodiversity
• interdependence within • deforestation → taking species
species → rely on each other shelters away
for shelter
• interdependence between
species→ one species eats
away the harmful stuff for
another species

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