There are three D cyclins in mammals:

cyclins D1, D2, and D3

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#Id: 7047

#XL - T Zoology

Neutral theory of molecular evolution- Developed by Motoo Kimura, who argued that most of the evolution of DNA sequences occurs by chance (genetic drift) rather than by natural selection. 

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#Id: 8767

#XL - T Zoology

Guanidinium ion and urea are chaotropic agents which disrupts hydrophobic core of proteins.

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#Id: 5507

#XL - T Zoology

The proportion of occupied patches will stabilize over time to 1− (x/m) x is the extinction rate of populations in patches per unit time m is the rate of movement between patches

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#Id: 9552

#XL - T Zoology

Gradualism is Darwin’s proposition that the differences between even radically different organisms have evolved by small steps through intermediate forms, not by leaps

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#Id: 9448

#XL - T Zoology

Receptor Homodimerization 

Cytokines (erythropoietin) activate receptors by forming dimers of two identical cytokine receptor proteins