Select Board & Class

Organisms and Environment - II

Population

Population:

• It is a group of similar individuals living in a geographical area, sharing similar resources, and capable of interbreeding.
• Population has certain attributes, which individual organisms do not possess:

• Birth rate per capita births

• Death rate per capita deaths

• Sex ratio − Ratio of number of males to females in a population

• Demography: It refers to the statistical study of human population considering the following factors:
• Distribution of population
• Size and Density of population
• Birth rate
• Death rate
• ​Growth rate of population (​Growth rate = Birth rate - Death rate)

Age distribution

• A population can be composed of individuals of different age groups.

• Age distribution plot for a given population is given by the age pyramid.

• The structure of the age pyramid determines the growth status of the population, whether it is growing, stable, or declining. Population size, more technically, is referred to as population density (N), which indicates the number of individuals inhabiting a particular niche.

If the population is huge, then relative density is measured instead of absolute density whose measurement is time-consuming.

Population:
• It is a group of similar individuals living in a geographical area, sharing similar resources, and capable of interbreeding.
• Population has certain attributes, which individual organisms do not possess:

• Birth rate per capita births

• Death rate per capita deaths

• Sex ratio − Ratio of number of males to females in a population

• Demography: It refers to the statistical study of human population considering the following factors:
• Distribution of population
• Size and Density of population
• Birth rate
• Death rate
• ​Growth rate of population (​Growth rate = Birth rate - Death rate)

Age distribution

• A population can be composed of individuals of different age groups.

• Age distribution plot for a given population is given by the age pyramid.

• The structure of the age pyramid determines the growth status of the population, whether it is growing, stable, or declining. Population size, more technically, is referred to as population density (N), which indicates the number of individuals inhabiting a particular niche.

If the population is huge, then relative density is measured instead of absolute density whose measurement is time-consuming.

• Biodiversity occurs not only in the species level, but also in the macromolecular levels.

• Biodiversity as described by Edward Wilson is the combined diversity at all levels of biological organisation.

• The most important forms of biodiversity are:

• Genetic diversity…

To view the complete topic, please

What are you looking for?

Syllabus