Upon absorbing UV-B photons, the tryptophans undergo structural changes that break the salt bridges, leading to the dissociation of the two functionally active monomers. The monomers then interact with COP1–SPA complexes to activate gene expression

TLS Online TPP Program

#Id: 8421

#Unit 10. Ecological Principles

Human populations can exist at equilibrium densities in one of two ways:

1. High birth and high death rates

2. Low birth and low death rate

TLS Online TPP Program

#Id: 8422

#Unit 10. Ecological Principles

The difference between the birth rate and the death rate determines the rate of natural increase or decrease

TLS Online TPP Program

#Id: 8423

#Unit 10. Ecological Principles

Parental investment - The amount of time and energy given to an offspring by its parents. 

Longevity - The life span of an organism. Also known as Life expectancy

TLS Online TPP Program

#Id: 8424

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 8425

#Unit 10. Ecological Principles

Fecundity - The number of offspring produced by an organism per reproductive episode. 

Parity - The number of reproductive episodes an organism experiences. 

TLS Online TPP Program

#Id: 8426

#Unit 10. Ecological Principles

Senescence - A gradual decrease in fecundity and an increase in the probability of mortality.