9-sinf ii-blok 1-variant 2017-2018 o’quv yili iv-chorak

9-sinf ii-blok 1-variant 2017-2018 o’quv yili iv-chorak biologiya 1. sayyoramizda tirik organizmlar necha yil oldin paydo bo‘lgan? a) 1-1,5 mlrd. b) 2-2,5 mlrd. c) 3-3,5 mlrd. d) 4-4,5 mlrd. 2. tiriklikning qaysi darajasida elementar evolyutsion o'zgarishlar kuzatiladi? a) molekula b) hujayra c) to'qima d) organizm 3. hayotning hujayrasiz shakllari berilgan javobni toping? a) bakteriyalar b) zambumg'lar c) prokariotlar d) viruslar 4. viruslar nechanchi yil qaysi olim tomonidan aniqlandi? a) 1892 yil, d. i. ivanovskiy b) 1892 yil, f. leffler c) 1665 yil, r. guk d) 1917 yil, f. de erell 5. viruslar qo‘zg‘atadigan kasalliklar to*g‘ri berilgan javobni toping? i ) gripp; 2) sil; 3) sariq; 4) vabo; 5) qizilcha; 6) xolera; a) 1, 2, 4 b) 1, 5, 6 c) …

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