The development of the vertebrate eye is a classic example used to describe the modus operandi of tissue organization via intercellular interactions.

TLS Online TPP Program

#Id: 8435

#Unit 10. Ecological Principles

r-selected species

High rate of per capita population growth

poor  competitive ability

Grows quickly 

age early, 

devoting much energy to producing  large number of progeny 

Small in size, and individuals do not live long. 

Random matting

TLS Online TPP Program

#Id: 8436

#Unit 10. Ecological Principles

Grime’s triangle

TLS Online TPP Program

#Id: 8437

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 8438

#Unit 10. Ecological Principles

Where conditions for plant growth are less stressful, plants can evolve life history traits that fall along a continuum from competitors to ruderals.

TLS Online TPP Program

#Id: 8439

#Unit 10. Ecological Principles

Without the abiotic stressors and without frequent disturbances, plants can grow rapidly for long periods of time, and this creates more competition among plants for soil nutrients and light.

Competitors also tend to grow to larger sizes and exhibit long life spans.

TLS Online TPP Program

#Id: 8440

#Unit 10. Ecological Principles

Source–sink metapopulation model - A population model that builds on the basic metapopulation model and accounts for the fact that not all patches of suitable habitat are of equal quality.