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Organisms and Populations

Short Answer Type

41. List the various abiotic environmental factors factors.

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42. If a marine fish is placed in a fresh water aquarium, will the fish be able to survive ? Why or why not ?

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43. Define phenotypic adaptation. Give one example.

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44. Most living organisms cannot survive at temperature at about 45°C. How are some microbes able to live in habitats with temperatures exceeding 100°C ?

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Long Answer Type

45. List the attributes that populations possess but not the individuals.

The attributes that populations possess but not the individuals are-

(i) Natality and Mortality - It is the number of births or deaths in a given population .

(ii) Evolution - A whole species of the population evolves and not an individual.

(iii) Population density is the number of inviduals per unit area at a given time.

(iv) Sex Ratio- It is the number of males to females in a given population.

(v) Age distribution is percentage of individuals of a given age or age group in the given population.

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