A carbon atom with four different substituents is said to be asymmetric, and asymmetric carbons are called chiral centers

Chiral carbon most distant from the carbonyl carbon has the same configuration as the chiral carbon in D-glyceraldehyde.

TLS Online TPP Program

#Id: 5740

#Unit 10. Ecological Principles

 Brian Walker (1992) proposed the Redundancy hypothesis Species that play the same roles in a community can compensate for each other if some are lost under particular conditions

TLS Online TPP Program

#Id: 5741

#Unit 10. Ecological Principles

Keystone hypothesis

TLS Online TPP Program

#Id: 5742

#Unit 10. Ecological Principles

Idiosyncratic hypothesis Community services change as the number of species increases or decreases, but that the direction of change is not predictable

TLS Online TPP Program

#Id: 5743

#Unit 10. Ecological Principles

Ecotones - An ecotone is a zone of junction or a transition area between two biomes (diverse ecosystems).

TLS Online TPP Program

#Id: 5744

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5745

#Unit 10. Ecological Principles

Mangrove forests - between marine and terrestrial  ecosystem

Grassland - between forest and desert 

Estuary - between fresh water and salt water

Riverbank or marshland - between dry and wet