Home
Class 12
BIOLOGY
a) Write the importance of measuring the...

a) Write the importance of measuring the size of a population in a habitat or an ecosystem.
b) Explain with the help of an exmaple how the percentage cover is a more meaningful measure of population size than mere numbers.

Text Solution

Verified by Experts

a) The size of the population tells us a lot about its status in the habitat.Whatever ecological processes are to be investigated in a population, be the outcomes of completion with another species, the impact of a predator, it is evaluated in terms of change in the population size.
b) Population size more technically called population density. Population size of a species is the number of individuals of a species per unit area volume.
`=("Number of individuals in a region "N)/("Unit area in a region"(S))`
`rArr P_(Delta) = N/S`
A population at any given time is compound of individuals of different ages. When the age of distribution (per cent individuals of a given age or age group) is plotted for the populations, the resulting structure is called age pyramid.
Promotional Banner

Similar Questions

Explore conceptually related problems

In an area there are 200 parthenium and a single banyan tree. Where of the conclusion (s) is /are correct ? I. population density of banyan is low II. Population cover area of banyan is high . III. In above case the percentage of cover of biomass is more meaningful than population size

In how many villages is the number of illiterate males, as a percentage of the total population, more than 21% ?

Read the following statements and select the correct option w.r.t. population attributes (a) Population density is necessarily measured in numbers (b) Tiger census is often based on pug marks and fecal pellets (c) Biomass is not a meaningful measure to know population size. (d) Size of a population for any species is not a static parameter

How many classes of town are there in India based on population size ? Give the size as well. Which of them has the highest percentage of people ?

Directions: The given pie-charts compares the total population and the female population of six countries, Australia, Canada, Germany, India, USA and Philippines. The first pie chart gives the percentage distribution of the total population of the six countries, while, the second pie chart gives the percentage distribution of the female population of the six countries. Study the pie-charts and answer the questions that follow. If the average population of Australia, Canada and Germany is 155400 more than the total population of India, then the total population of USA and Philippines is how much less than the total population of India?

Given below are four jumbled sentences. Select the option that gives their correct order A. However, the rate of population increase is another important factor to consider. B. This change can be expressed in two ways. C. Growth of population refers to the change in the number of inhabitants of a country. D. First, in terms of absolute numbers and second, in terms of percentage change.