Advertisements
Advertisements
प्रश्न
What would be the best method to measure the total population density of a dense bacterial culture in a petridish and why?
Advertisements
उत्तर
Measuring the biomass or percent cover rather than the number is the most accurate way to determine the total population density of a dense bacterial culture in a petridish. This is due to the fact that counting the population of a thick bacterial culture would either be impossible or take a long time.
APPEARS IN
संबंधित प्रश्न
Study the graph given below and answer the questions that follow :
(i) Write the status of food and space in the curves (a) and (b).
(ii) In the absence of predators, which one of the two curves would appropriately depict the prey population?
(iii) Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line
Represent diagrammatically three kinds of age-pyramids for human populations.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?
What is an age-pyramid?
Define the carrying capacity.
Give an account of population regulation.
What parameters are used for tiger census in our country’s national parks and sanctuaries?
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.
Important attributes belonging to a population but not to an individual are:
- Birth rate and death rate
- Male and female
- Birth and death
- Sex-ratio
Select the correct option from the given options:
