Monoterpenes ester are called pyrethroids

occur in leaves and flower of chrysanthemum species show very striking insecticidal activity

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#XL - T Zoology

Average fitness

In a species, only 1 of every 1000 seeds survives to reproductive age, and that those that survive produce an average of 3000 seeds.

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#XL - T Zoology

The components of fitness are survival and reproduction.

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#XL - T Zoology

Fitness

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Selection coefficient - which is the relative intensity of selection against a  genotype

Selection coefficient (1 - W)

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#XL - T Zoology

Proportional contribution of genotypes to population

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Relative genotypic frequency after selection