During S phase

DNA-bound G1 cohesins Convert into cohesive complexes by cohesin acetyl transferases (CoATs)

which acetylate Smc3 subunit & prevents unloading of cohesins by Pds5-Wapl, thereby stabilizing the cohesins on chromosomes.

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#Unit 10. Ecological Principles

The rate of extinction is low at the time of first colonization and immigration rate is highest.

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#Id: 5855

#Unit 10. Ecological Principles

Earlier arriving species tend to be r-selected species, which are better dispersers, whereas later arriving species are generally K-selected species, which are better competitors.

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#Id: 5856

#Unit 10. Ecological Principles

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#Id: 5857

#Unit 10. Ecological Principles

The number of species should decrease with increasing distance of the island from the mainland - The species distance hypothesis

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#Id: 5858

#Unit 10. Ecological Principles

The number of species should increase with increasing island size. This is also known as the species-area hypothesis.

TLS Online TPP Program

#Id: 5859

#Unit 10. Ecological Principles

Larger populations are more resistant to extinctions.  Greater ranges of habitats promote increased speciation rates.