Evolution of oxygenase activity occurred before the time, about 2.5 billion years ago, when production of O2 by photosynthetic organisms started to raise the oxygen content of the atmosphere.

TLS Online TPP Program

#Id: 1826

#Unit 10. Ecological Principles

dN/dt has its maximum at an intermediate population Size specifically, at N = K/2.

Maximum sustainable yield = rK/2

TLS Online TPP Program

#Id: 1960

#Unit 10. Ecological Principles

Quadrats- A square frame often, but not always, measuring 50 × 50 cm.

TLS Online TPP Program

#Id: 1961

#Unit 10. Ecological Principles

A cohort is a group of same-aged young which grow and survive at similar rates.

A population is often made up of organisms from a variety of different cohorts.

TLS Online TPP Program

#Id: 1962

#Unit 10. Ecological Principles

A life table provides data on the number of individuals alive in different age classes and the age-specific survival or mortality rates in these age classes.

TLS Online TPP Program

#Id: 1963

#Unit 10. Ecological Principles

The cohort life table follows a cohort of individuals from birth to death. 

Cohort life tables can be used to estimate the age-specific probabilities of survival.

TLS Online TPP Program

#Id: 1964

#Unit 10. Ecological Principles

A static life table accomplishes the same goal, but instead of following a cohort of individuals from life to death, data is gathered on the age structure of a given population at one point in time.