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
Write what do phytophagous insects feed on.
Define community.
In Logistic growth curve lag phase shows______.
Define mutualism.
Match the Columns.
| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
Mycorrhizae are the example of ______.
Rafflesia an arnoldii is an example of ______.
The value of 'Z' (regression coefficient) lies in the range of ______ regardless of the taxonomic group or the region.
What are the special adaptations that endoparasites show?
Give one example of camouflage.
