G-banding patterns reveal that several human chromosomes differ from those of chimpanzees by only a pericentric inversion.

TLS Online TPP Program

#Id: 5720

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5721

#Unit 10. Ecological Principles

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.