Home
Class 12
BIOLOGY
Population size, more technically called...

Population size, more technically called population density (designated as N), need not necessarily be measured in numbers only. Explain the reasons for this with examples.

Text Solution

Verified by Experts

If the population is huge and counting is impossible or very time-consuming. If you have adense laboratory culture of bacteria in a Petri dish what is the best measure to report its density for certain ecological investigations, there is no need to know the absolute population densities, relative densities serve the purpose equally well.
For example, the number of fish caught per trap is good enough measure of its total population density in the lake.
For example, the tiger census in our national parks and tiger reserves is often based on pugmarks and faecal pellets.
Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND POPUIATIONS

    OSWAAL PUBLICATION|Exercise TOPIC :2 Long Answer Type Questions|10 Videos

  • ORGANISMS AND POPUIATIONS

    OSWAAL PUBLICATION|Exercise TOPIC :2 Multiple Choice Questions|20 Videos

  • ORGANISMS AND POPUIATIONS

    OSWAAL PUBLICATION|Exercise TOPIC :2 Short Answer Type Questions-I|23 Videos

  • MOLECULAR BASIS OF INHERITANCE

    OSWAAL PUBLICATION|Exercise TOPIC-2: Multiple Choice Questions|28 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATIONS

    OSWAAL PUBLICATION|Exercise (TOPIC 2 ) (SEX DETERMINATION AND GENETIC DISORDERS (MULTIPLE CHOICE QUESTIONS ))|18 Videos

Similar Questions

Explore conceptually related problems

In a beetle population, the number of green beetles is more than red and blue beetles, Give a reason behind this situation.

Although total number is generally the most appropriate measure of population density, it is in some cases either meaningless or difficult to determine. What is the alternative method?

Draw and explain a logistic curve for a population of density (N) at time (t) whose 'intrinsic rate of natural increase is (r) and carrying capacity is (k).

The number of births during a period in the population that are added to the initial density is called natality.

A homopolymer has only one type of building block called monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of amino acids. While a nucleic acid like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of

In a city no two person have identical set of teeth and there is no person without a tooth. Also no person has more than 32 teeth. If two disregard the shape and size of tooth and consider only the positioning of the teeth, then the maximum population of the city is :