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Tirik organizimning girizontal va vertikal yo'nalishida o'zgarishi MUNDARIJA   KIRISH ………………………………………………………….…… 3 I-BOB: TIRIK ORGANIZMLARNING GORIZONTAL YO‘NALISHDAGI O‘ZGARISHLARI ………………………………… 6 1.1 Ekologik faktorlar ta’sirida gorizontal yo‘nalishdagi moslashuvlar …… 6 1.2 Biogeografik zonalar bo‘yicha tirik organizmlarning gorizontal tarqalishi …………………………………………………………………... 9 II-BOB: TIRIK ORGANIZMLARNING VERTIKAL YO‘NALISHDAGI O‘ZGARISHLARI ……………………….……… 16 2.1. Balandlik zonalligi va biologik xilma-xillik …………………………. 16 2.2. Vertikal migratsiyalar va ularning biologik ahamiyati ……………… 21 XULOSA …………………………………………………………………. 25 FOYDALANILGAN ADABIYOTLAR ……………..……….………… 27    

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