The SKN-1 protein is a maternally expressed transcription factor that controls the fate of the P1 blastomere(P1🡪EMS 🡪MS), that generates the posterior pharynx.

TLS Online TPP Program

#Id: 5508

#Unit 10. Ecological Principles

                                                                                                                                               

TLS Online TPP Program

#Id: 5509

#Unit 10. Ecological Principles

Different kinds of metapopulations

TLS Online TPP Program

#Id: 5510

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5511

#Unit 10. Ecological Principles

Populations of some species are prone to extinction for two reasons

1. The landscapes they live in are patchy (making dispersal between populations difficult).

2. Environmental conditions often change in a rapid and unpredictable manner.

TLS Online TPP Program

#Id: 5513

#Unit 10. Ecological Principles

The size of a population is determined by a balance between births, immigration, deaths and emigration.

TLS Online TPP Program

#Id: 5515

#Unit 10. Ecological Principles

Natality means production of new individuals (offspring). 

Maximum or Absolute natality - maximum offspring produced under most suitable environmental conditions. 

Ecological natality - refers to number of offspring produced under prevailing environmental conditions.