Nurturing Life Sciences
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#XL - T Zoology
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Postulate of Darwin
Geometric increase
Limited food & Space
Struggle for existence
Variation
Natural selection
Inheritance of useful characters
Speciation
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Light absorption by rhodopsin→activation of a cGMP PDE → hydrolyzes cGMP to 5′-GMP→ cGMP levels drop →channel close →membrane hyperpolarization→reduction in NT release→transmitted to brain
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