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SSC Biology (Subjective) Model Question-4

Subject: Biology (Subjective)                         Subject code: 138
Class-X   
[N.B: The figures in the margin indicate full marks. Answer with labelled diagram where ever necessary. Different parts of a question will have to answer serially.]

Group-A Botany

Answer any three
1.         (a)        What is phytohormone?                                                                                                          1
            (b)        Describe the role of auxins and gibberellins in growth and development of plants.              4
2.         (a)        Mention the importance of coconut trees.                                                                              3
            (b)        Write down four differences between virus & bacteria.                                                        2
3.         (a)        Describe about vernalization?                                                                                                 2
            (b)        Draw labelled diagram of a stamen and write the function of stamen.                                  3
4.         (a)        Describe the importance of fertilization.                                                                                2
            (b)        With example describe the characteristics of hydrophilous flowers.                                      3

Group-B Zoology


5.         (a)        What is called binary fission?                                                                                                 1
            (b)        Describe how the amoeba reproduces by the process of binary fission.                                 4
6.         (a)        Where is blood?                                                                                                                      1
            (b)        Write down four differences between artery and vein?                                                         4
7.         (a)        Write down the rules of modern classification.                                                                      3
            (b)        Classify human upto species level.                                                                                         2
8.         (a)        What do you mean by parasite and how many they are?                                                       2
            (b)        Write down the digestive system of Round worm in brief.                                                   3

Group-C Combined

Answer any two
9.         (a)        Write down the chemical composition and function of chromosome.                                   2
b)         Describe the prometaphase and anaphase stages of mitosis cell division.                              3
10.       a)         Where is Sundarban situated?                                                                                                2
b)         Describe the characteristics of this forest?                                                                             3
11.       (a)        What is green house?                                                                                                              1
b)         Describe the green house effect?                                                                                            4
12.       a)         What do you mean by economic biology?                                                                              1
b)         Write down the importance of honey bee.                                                                             4

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