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: 9166

#Section 3: Genetics, Cellular and Molecular Biology

Mutation

Mutation has changed the allelic frequency.

it increases genetic variation within populations and between population.

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#Id: 7334

#Section 3: Genetics, Cellular and Molecular Biology

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#Id: 8523

#Section 3: Genetics, Cellular and Molecular Biology

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#Id: 8202

#Section 3: Genetics, Cellular and Molecular Biology

Most of the lysosome membrane proteins, are highly glycosylated, which helps to protect them from the lysosome proteases

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#Id: 8127

#Section 2: General Biology

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression.