Populational change is Darwin’s hypothesis that evolution occurs by changes in the proportions (frequencies) of different variant kinds of individuals within a population.

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#Id: 5640

#Unit 7. System Physiology – Animal

The photosensitive pigment in the rods is called rhodopsin (visual purple).

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#Id: 6999

#Unit 5. Developmental Biology

Unlike pluripotent stem cells, adult or multipotent stem cells in culture not only have a restricted array of cell types that they can create, but they also have a finite number of generations for self-renewal.

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#Id: 6011

#Unit 3. Fundamental Processes

Hence Cdc6 and Cdt1 are the key licensing factors and helicase loading proteins.

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#Id: 5960

#Unit 10. Ecological Principles

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#Id: 6733

#Unit 8. Inheritance Biology