A:T base pairs are thus favored because they are more readily distorted to allow the initial opening of the minor groove. There are also extensive interactions between the phosphate backbone and basic residues in the b sheet, adding to the overall binding energy of the interaction.

TLS Online TPP Program

#Id: 5841

#Unit 10. Ecological Principles

Plant species richness with field age

TLS Online TPP Program

#Id: 5842

#Unit 10. Ecological Principles

Characteristics of early and late seral stages

TLS Online TPP Program

#Id: 5843

#Unit 10. Ecological Principles

Character                     early-stage     late stage 

Root to shoot ratio                    high               low

Number of seed                          many             few

Seed size                                      small             large

Biotic potential                           high              low

Productivity per biomass           high              low

NPP                                              high              low

P/R ratio                                       >1                =1

Nutrient cycling                          open             closed

Importance of detrivores           less                more

Stratification                               No                Yes 

Regeneration ability                   more             less

Resistance ability                        less               more

TLS Online TPP Program

#Id: 5844

#Unit 10. Ecological Principles

Restoration ecology is the full or partial repair or replacement of biological habitats and/or their populations that have been degraded or destroyed.

TLS Online TPP Program

#Id: 5845

#Unit 10. Ecological Principles

Complete restoration - Conservationists attempt to return a habitat to its condition prior to the disturbance. 

TLS Online TPP Program

#Id: 5846

#Unit 10. Ecological Principles

Rehabilitation - Approach aims to return the habitat to something similar to, but a little less than, full restoration