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12th CBSE
IMPORTANT
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For a population that is stable, the following age distribution indicates that

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Important Questions on Organisms and Populations

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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 3
A particular species of tropical fish has only a few offspring and takes care of them for an extended period. We might also expect the fish population to
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 4
Ecological niche is:
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 7
Salt concentration (Salinity) of the sea measured in parts per thousand is 
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 12
If a population of 50 Paramecium present in a pool increases to 150 after an hour. What would be the percent growth or birth rate per individual per hour for the same population ?
 
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 17
Lichens are an association of
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>SELF-ASSESSMENT TEST>Q 11
Explain what does the equation given below show: NPP = GPP - R
 
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12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>SELF-ASSESSMENT TEST>Q 12
What is an age-pyramid?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>SELF-ASSESSMENT TEST>Q 12
 Name three representative kinds of age-pyramids for the human population and list the characteristics for each one of them.