Quyida berilgan hayvonlarning ajdodlari to’g’ri berilgan javobni toping.
1)yassi chuvalchanglar; 2)to’garak chuvalchanglar; 3)halqali chuvalchanglar; 4)mollyuskalar
a)yassi chuvalchanglar; b)soxta oyoqlilar; c)infuzoriyalar; d)volvoks; e)kovakichlilar; f)halqali chuvalchanglar

1. 1-e, 2-a, 3-a, 4-f
2. 1-a, 2-b, 3-c, 4-e
3. 1-b, 2-e, 3-d, 4-c
4. 1-c, 2-a, 3-f, 4-a
5. 1-f, 2-d, 3-b, 4-c