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If in a population of size N, the birth ...

If in a population of size N, the birth rates represented as b and death rates as d,then derive the formula to calculate the increase or decrease in N during a unit time period t (dN/dt).

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`dN// dt= (b-d)xx N`
Let `(b-d) = r`, then
`dN// dt = r N`.
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OSWAAL PUBLICATION-ORGANISMS AND POPUIATIONS-TOPIC :2 Short Answer Type Questions-I
  1. Mention any two attributes that as individual organism does not have b...

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  2. List the methods used to estimate population size.

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  3. In a pond there are 20 lotus plants last year and through reproduction...

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  4. Give the diagrammatic representation of an expanding age pyramid.

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  5. Give the diagrammatic representation of a stable age pyramid.

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  6. Give the diagrammatic representation of a declining age pyramid.

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  7. What are the observations one can make from the study of population?

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  8. Mention the four basic processes,· because of which density of a popul...

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  9. Give the 'r" value (intrinsic rate of natural increase) value for Huma...

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  10. Mention the characteristic of exponential growth.

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  11. If in a population of size N, the birth rates represented as b and dea...

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  12. Explain the characteristic features of a population showing logistic g...

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  13. Explain Connell's experiment.

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  14. What is 'resource partitioning'?

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  15. Predators also help in maintaining species diversity in a community, b...

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  16. How monarch butterfly survives from its predator?

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  17. Why do clown fish and sea anemone pair up? What is this relationship c...

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  18. Why herbivores are considered similar to predators in the ecological c...

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  19. How do the increase and the decrease in the value of 'r' affect the po...

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  20. What does S-Shaped pattern of population growth represent? How is J-sh...

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