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51.

List any three important characteristics of a population and explain.

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52. Explain competitive release.

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53. List the various attributes of a population.

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54.

Explain J-Shaped pattern of population growth.

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Differences between S-shaped and J-shaped growth curves

S-shaped growth curve

J-shaped growth curve

1. It depicts logistic growth of population.

2.The graph is obtained when the resources are unlimited.

3. It has more than two phases that is Lag phase, Accelerating, decelerating and stationary phase.

1.It depicts the exponential growth or geometric growth of population.

2. The graph is obtained when the resources are limited.

3. It shows two phases that is Lag phase and Exponential phase.

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56.

Explain population density.

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57. Differentiate natality rate and Mortality rate.

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58. Differentiate natality rate and death rate.

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59.

Give an example for:
(a) An endothermic animal
(b) An ectothermic animal
(c) An organism of benthic zone

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60. What is predator and prey ? Give example.

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