Suvda hamda quruqlikda yashovchilarning kelib chiqishi va evolutsiyasi KIRISH--------------------------------------------------------------------------------3 I.BOB.ASOSIY QISM---------------------------------------------------------------------9 I.I.Amfibiyalarning yashash sharoiti vatarqalishi -------------------------------9 I.II. Suvda hamda quruqlikda yashovchilarning xilma-xilligi-----------------17 I.III. Amfibiyalarning kelib chiqishi va evolutsiyasi-----------------------------24 II.BOB.XULOSA---------------------------------------------------------------------------42 III.BOB.ILOVA ----------------------------------------------------------------------------43 FOYDALANILGAN ADABIYOTLAR-----------------------------------------49