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ICSE Class X Prelims 2023 : Biology (St. Gregorios High School, Mumbai)

12 pages, 80 questions, 1 questions with responses, 1 total responses,    0    0
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Indian Certificate of Secondary Education (ICSE), New Delhi
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0 ST. GREGORI OS HIGH SCHOOL PRELIMINARY EXAMINATION ~ ro. : \ SUBJECT: BIOLOGY MARKS : 80 TIME : 2 hrs. NO. OF PAGES:12 DA TE : 1S/1/!J writing time is The time. this during 11,c- fi~l I~ minutes arc for reading only. No wTiting work to be done excluding this reading time. SECTION A (Attempt all questions from this section) Question J. Select the correct answers to the questions from the given options. (Do not copy chc question. Write the correct answer only): (i) (ii) (iii ) In the absence of the cytokinin, which of the following effect will be seen? (a) More chlorophylJ synthesis. (b) Ageing of the plant part. (c) Increased rate of cell division. (d) Exr ansion of the cotyledons of the seed. On~ example of a radiation pollutant is: (a) lodjne 131 (b) Mercury (c) Lead (d) Phosphorus Which of the following statements is not true with reference to the crossing over phenomenon of meiosis? (a) Tetrad formation (b) J~xchange (c) Chiasma formation (d) I-fomologous pair format ion of sister chromatids 1 of 12 [15]

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