Phototropins (phots) are involved in directing organ, chloroplast, and nuclear movements, solar tracking, and stomatal opening

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#XL - T Zoology

Adaptation is a characteristic that enhances the survival or reproduction of organisms .

Adaptations have evolved by natural selection, which is the centerpiece of On the Origin of Species

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#XL - T Zoology

Adaptation has costly side effects

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#XL - T Zoology

Fitness 

Fitness is defined as the relative reproductive success of one genotype compared with other genotypes in the population

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#XL - T Zoology

Fitness- Average number of offspring produced by a genotype and divide it by the mean number of offspring produced by the most prolific genotype

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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