XII
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Topic:
ORGANISM AND POPULATION
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QUESTIONS
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NOTES
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Ecology:
study of interactions among org., n b/w its phy/abiotic env
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4
levels: organisms < population
< communities < biomes
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At
org level – physiological (adaptations for survival n reproduction) along
course of evolution thru nat selection… adaptations developed
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Biome
formation: rotation of sun leading to temp variations, seasons, precipitation
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Major
Biomes: Desert, Grassland, Tropical, Temperate n Coniferous forests, Arctic n
Alpine Tundra
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Habitat:
Regional & local variation
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*Intestine
(habitat for 100s of microbes)
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Habitat determined by:
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Temp:
variations due to season, altitude, altitude.
Range sub 0 - >50 deg C
Excep:
thermal springs, deep sea hydrothermal vents (temp upto 100 deg C)
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Impact
of temp on:
- enzyme Kinetics
- Basal Metabolism
- Physiological functions
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