View note:cbse-biology-class9



Questions of this subject!.

QuestionLikes!Dislikes!Answers!
1)Differentiate plant cells from animal cells. -cbse-biology-class9

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2)How is a prokaryotic cell different from a eukaryotic cell? -cbse-biology-class9

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3)What would happen if the plasma membrane ruptures or breaks down? -cbse-biology-class9

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4)What would happen to the life of the cell if there is no golgi apparatus? -cbse-biology-class9

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5)Which organelle is known as the power house of the cell? Why? -cbse-biology-class9

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6)Where do the lipids and proteins constituting the cell membrane get synthesised? -cbse-biology-class9

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7)How does amoeba obtain its food? -cbse-biology-class9

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8)What is osmosis? -cbse-biology-class9

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9)Define the term tissue. -cbse-biology-class9

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10)How many types of elements together make up a xylem tissue? Name them. -cbse-biology-class9

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11)How are simple tissues different from complex tissues in plants? -cbse-biology-class9

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12)Differentiate parenchyma, collenchyma and sclerenchyma on the basis of their cell wall. -cbse-biology-class9

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13)What are functions of stomata? -cbse-biology-class9

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14)Differentiate the three types of muscle fibres. -cbse-biology-class9

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15)What is the specific function of a cardiac muscle? -cbse-biology-class9

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16)Explain the Structural Organisation of a Cell. -cbse-biology-class9

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17)Explain the Transport of Materials across Cells. -cbse-biology-class9

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18)What is Passive transport? -cbse-biology-class9

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19)What is the utility of tissues in multi-cellular organisms? -cbse-biology-class9

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20)Why do we classify organisms? -cbse-biology-class9

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21)Give three examples of the range of variations that you see in life forms around you. -cbse-biology-class9

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22)Which do you think is a more basic characteristic for classifying organisms? -cbse-biology-class9

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23)What is the primary characteristic on which the first division of organisms is made? -cbse-biology-class9

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24)On what basis are plants and animals put into different categories? -cbse-biology-class9

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25)Which organisms are called primitive and how are they different from the so-called advanced organisms? -cbse-biology-class9

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26) Will advanced organisms be the same as complex organisms? Why? -cbse-biology-class9

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27)What is the criterion for classification of organisms as belonging to kingdom Monera or Protista? -cbse-biology-class9

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28)In which kingdom will you place an organism which is single celled, eukaryotic and photosynthetic? -cbse-biology-class9

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29)In the hierarchy of classification, -cbse-biology-class9

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30)Which division among plants has the simplest organisms? -cbse-biology-class9

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31)How are Pteridophytes different from Phanerogams? -cbse-biology-class9

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32)How do gymnosperms and angiosperms differ from each other? -cbse-biology-class9

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33)How do poriferan animals differ from coelenterate animals? -cbse-biology-class9

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34)How do annelids animals differ from arthropods? -cbse-biology-class9

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35)What are the differences between amphibians and reptiles? -cbse-biology-class9

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36)What are the differences between animals belonging to the Aves group and those in the Mammalia group? -cbse-biology-class9

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37)What are the advantages of classifying organisms? -cbse-biology-class9

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38)How would you choose between two characteristics to be used for developing a hierarchy in classification? -cbse-biology-class9

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39) Explain the basis for grouping organisms into five kingdoms. -cbse-biology-class9

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40)What are the major divisions in the Plantae? What is the basis for these divisions? -cbse-biology-class9

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41)How are the criteria for deciding divisions in plants different from the criteria for deciding the sub-groups among the animals? -cbse-biology-class9

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42)Explain how animals in Vertebrata are classified into further subgroups. -cbse-biology-class9

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43)State any two conditions essential for good health.-cbse-biology-class9

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44)State any two conditions essential for being free of disease.-cbse-biology-class9

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45)Are the answers to the above questions necessarily the same or different? Why? -cbse-biology-class9

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46)List any three reasons why you would think that you are sick and ought to see a doctor. -cbse-biology-class9

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47)In which of the following case do you think the long-term effects on your health are likely to be most unpleasant? -cbse-biology-class9

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48)Why we are normally advised to take bland and nourishing food when we are sick? -cbse-biology-class9

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49)What are the different means by which infectious diseases are spread? -cbse-biology-class9

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50)What precautions can you take in your school to reduce the incidence of infectious diseases? -cbse-biology-class9

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51)What is immunization? -cbse-biology-class9

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52)What are immunization programmes available at the nearest health centre in your locality? -cbse-biology-class9

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53)How many times did you fall ill last year? What were the illnesses? -cbse-biology-class9

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54)A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself. -cbse-biology-class9

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55)Conduct a survey in your neighborhood to find out what the three most common diseases are. -cbse-biology-class9

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56)A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out -cbse-biology-class9

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57)Under which of the following conditions is a person most likely to fall sick? -cbse-biology-class9

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58)Under which of the following conditions is a person most likely to fall sick? -cbse-biology-class9

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59)Under which of the following conditions are you most likely to fall sick? -cbse-biology-class9

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60)How is our atmosphere different from the atmospheres on Venus and Mars? -cbse-biology-class9

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61) How does atmosphere act as a blanket? -cbse-biology-class9

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62)What causes winds? -cbse-biology-class9

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63)How are clouds formed? -cbse-biology-class9

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64)List any three human activities that you think would lead to air pollution. -cbse-biology-class9

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65)Why water is important for living organisms? -cbse-biology-class9

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66)What is the major source of fresh water in the city/town/village where you live? -cbse-biology-class9

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67)Do you know of any activity which may be polluting this water source? -cbse-biology-class9

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68)How is soil formed? -cbse-biology-class9

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69)What is soil erosion? -cbse-biology-class9

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70)What are the methods of preventing or reducing soil erosion? -cbse-biology-class9

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71)Why is the atmosphere essential for life? -cbse-biology-class9

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72)Why is water essential for life? -cbse-biology-class9

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73)How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource? -cbse-biology-class9

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74)You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather? -cbse-biology-class9

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75)What are the different states in which water is found during the water cycle? -cbse-biology-class9

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76) Name two biologically important compounds that contain both oxygen and nitrogen. -cbse-biology-class9

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77)List any three human activities which would lead to an increase in the carbon dioxide content of air. -cbse-biology-class9

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78)What is the greenhouse effect? -cbse-biology-class9

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79)What are the two forms of oxygen found in the atmosphere? -cbse-biology-class9

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80)We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. -cbse-biology-class9

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81)Write a note on how forests influence the quality of our air, soil and water resources. -cbse-biology-class9

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82)What do we get from cereals, pulses, fruits and vegetables? -cbse-biology-class9

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83)How do biotic and abiotic factors affect crop production? -cbse-biology-class9

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84)What are the desirable agronomic characteristics for crop improvements? -cbse-biology-class9

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85)What are macro-nutrients and why are they called macro-nutrients? -cbse-biology-class9

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86)How do plants get nutrients? -cbse-biology-class9

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87)Compare the use of manure and fertilizers in maintaining soil fertility. -cbse-biology-class9

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88)Which of the following conditions will give the most benefits? Why? -cbse-biology-class9

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89)Why should preventive measures and biological control methods be preferred for protecting crops? -cbse-biology-class9

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90)What factors may be responsible for losses of grains during storage? -cbse-biology-class9

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91) Which method is commonly used for improving cattle breeds and why? -cbse-biology-class9

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92)Discuss the implication of following statement -cbse-biology-class9

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93)What management practices are common in dairy and poultry farming? -cbse-biology-class9

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94)What are the differences between broilers and layers and in their management? -cbse-biology-class9

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95)How are fish obtained? -cbse-biology-class9

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96)What are the advantages of composite fish culture? -cbse-biology-class9

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97)Who discovered cells, and how? -cbse-biology-class9

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98)How do substances like CO2 and water move in and out of the cell? Discuss. -cbse-biology-class9

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99)Why is the plasma membrane called a selectively permeable membrane? -cbse-biology-class9

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100)Why are lysosomes konwn as suicide bags? -cbse-biology-class9

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