Advertisements
Advertisements
प्रश्न
Define population growth. Explain different types of age pyramids.
Advertisements
उत्तर
Definition: The increase in the size of a population or increase in number of individuals is known as population growth. When resources in the habitat are unlimited, population show exponential growth. When resources in the habitat are limited, it leads to competition between individuals for limited resources. This type of population growth is called logistic growth
Age distribution and Age pyramids:
- A population consists of individuals with different ages. The entire population is divided into three age groups - prereproductive (0-14 years), reproductive (age 15-44 years), post reproductive (45-85+years)The relative proportion of individuals of various age groups in the population is referred to as age structure of the population.
- If the age distribution (per cent individuals of a given age or age group) is plotted for the population, the resulting structure is called as age pyramid.
संबंधित प्रश्न
Why do clown fish and sea anemone pair up? What is this relationship called?
State Gause’s competitive exclusion principle.
Select the statement which explains best parasitism.
Answer the following question.
Mention the term used to describe a population interaction between an orchid growing on a forest tree.
Name the type of association:
Clownfish and sea anemone
Explain any three important characteristics of population.
Which one of the following is one of the characteristics of a biological community?
An interaction favourable to both population but no obligatory to either is ______.
Give one example for the following type.
Chemical defense agent
Discuss the various types of positive interactions between species.
