MEDIUM
12th CBSE
IMPORTANT
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If a population of 50 Paramecium present in a pool increases to 150 after an hour, what would be the growth rate of the population?

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Important Questions on Organisms and Populations

MEDIUM
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 ?
 
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 13
A population has more young individuals compared to older individuals. What would be the status of the population after some years?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 14

At which point in the graph shown below would there be zero population growth (DN/Dt = 0)?

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MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 15

For a population that is stable, the following age distribution indicates that

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MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 16
Amensalism is an association between two species where:
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 17
Lichens are an association of
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 18
Which of the following is a partial root parasite?
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 13 - Organisms and Populations>Multiple Choice Questions [1 mark]>Q 19

The birth and death rates of the four countries are given below. Which one will have the least population growth rate?

         Country Birth rate/ 100  Death rate/100
M 15 5
N 25 10
O 35 18
P 48 41