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