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ISC Board Specimen 2015 : Biology Paper 2 (Practical II of II)

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Indian School Certificate Examination (ISC), New Delhi
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SPECIMEN PAPER II OF II BIOLOGY PAPER - 2 (PRACTICAL) (Three hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) -------------------------------------------------------------------------------------------------------------------------Answer all questions. All working including rough work should be done on the same sheet as the rest of the answer. The intended marks for questions or parts of questions are given in brackets [ ] Note: Q4 (Spotting) is to be attempted on a separate continuation sheet. The continuation sheet is to be handed over to the Supervising Examiner after the last observation. This continuation sheet should be attached to the main answer booklet of the candidate after the examination. -------------------------------------------------------------------------------------------------------------------------Question 1 [5] (a) Examine carefully the flower specimens D41 and D42 provided. Describe their floral characters in semi-technical terms. (Details of individual whorls are not required). (b) Cut a longitudinal section of the flower specimen D41 with a sharp razor blade. Arrange one of the cut surfaces on a moist filter paper. Draw a neat and labelled diagram of the cut surface. (c) With the help of a sharp blade cut a longitudinal section of specimen D42. Arrange one of the cut surfaces on a moist filter paper. Draw a neat and labelled diagram of this cut surface, highlighting the essential whorls. (d) Observe with a hand lens the cut surfaces of D-41 and D-42. Record your observations in the table below: Androecium D41 D42 (i) Relation of stamens to each other -- -- (ii) Method of attachment of anther to filament -- -- -- -- -- -- Gynoecium (i) Nature of stigma (ii) Type of placenta (e) Name the families to which each flower specimen belongs. (f) Point out any two features, which are distinctive characteristics of each family. ---------------------------------------------------------------------------------------------------------------------------70 ISC SPECIMEN QUESTION PAPER 2015

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Additional Info : ISC Board Specimen Question Paper 2015 Biology Paper 2 Practical II of II
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