Advertisements
Advertisements
प्रश्न
Give an account of population regulation.
उत्तर
The inherent tendency of all animal populations is to increase in number. But it does not increase indefinitely. Once the carrying capacity of the environment is reached, population numbers remain static or fluctuate depending on environmental conditions. This is regulated by many factors which are
- Density independent – Extrinsic factors
- Density-dependent – Intrinsic factors
Extrinsic factors include the availability of space, shelter, weather, and food, etc. Intrinsic factors include competition, predation, emigration, immigration, and diseases.
APPEARS IN
संबंधित प्रश्न
List the attributes that populations but not individuals possess.
What is reproductive fitness? Explain it with the help of an example.
Answer the following question.
What is "population" according to you as a biology student?
Nutrient enrichment of water body result.
Age distribution in a population can influence
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Bacteria
Define ‘zero population growth rate’. Draw a age pyramid for the same.
List any four characters that are employed in human population census.
An individual and a population has certain characteristics. Name these attributes with definitions.
Given below is the Age Pyramid of the population in one of the states in India as per 2011 census. It depicts the male population on the left-hand side, female population on the right-hand side, newborns towards the base and gradually increasing age groups as we move from base to the top, with the oldest population at the top. Study this pyramid and comment upon the appropriateness of the Assertion and the Reason.
Percentage to the total population
Assertion: It is a stable population.
Reason: The pre-reproductive and reproductive individuals are almost in equal numbers and the post-reproductive individuals are relatively fewer.
