During first cleavage, the metaphase plate is closer to the posterior, & fertilized egg is divided into two cells:

one having the anterior PARs (PAR-6 and PAR-3)

one having the posterior PARs (PAR-2 and PAR-1)

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#Id: 2166

#Unit 11. Evolution and Behavior

Adaptation has costly side effect

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#Id: 2167

#Unit 11. Evolution and Behavior

Natural selection is any consistent difference in fitness among different classes of biological entities.

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#Id: 2168

#Unit 11. Evolution and Behavior

Fitness is as the number of offspring an individual leaves in the next generation.

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#Id: 2169

#Unit 11. Evolution and Behavior

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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#Id: 2170

#Unit 11. Evolution and Behavior

The components of fitness are survival and reproduction.

TLS Online TPP Program

#Id: 2171

#Unit 11. Evolution and Behavior

Fitness