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TLS Online TPP Program

#Id: 8881

Plk1 is critical for formation of the mitotic spindle as well as for chromosome segregation.

#Unit 2. Cellular Organization #Steps in cell cycle, regulation and control of cell cycle #Part B Pointers
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TLS Online TPP Program

#Id: 5722

#Unit 10. Ecological Principles

Ecotypes, individuals of a species that vary in external appearance and their variations are genetically fixed and irreversible The individuals of a species growing under different environmental conditions differ in external appearance, but these changes are only temporary, not permanent, and hence reversible Ecads (Ecophenes). 
TLS Online TPP Program

#Id: 5723

#Unit 10. Ecological Principles

Species-Time Hypothesis 

Communities diversify, that is, gain species, with time

Temperate regions are less species-rich than tropical regions because they are younger and have only more recently recovered from glaciations and severe climatic disruption
TLS Online TPP Program

#Id: 5724

#Unit 10. Ecological Principles
TLS Online TPP Program

#Id: 5725

#Unit 10. Ecological Principles

The Species-Area Hypothesis Large areas contain more species than small areas because they can support larger populations and a greater range of habitats.
TLS Online TPP Program

#Id: 5726

#Unit 10. Ecological Principles
TLS Online TPP Program

#Id: 5727

#Unit 10. Ecological Principles

The Species-Energy Hypothesis

Available energy determines species richness.

Increased solar energy, together with an abundance of water, results in high productivity of plants.