Quyidgi hayvonlarga mos nerv sistemasi to’g’ri berilgan javobni toping.
1)yomg’ir chuvalchangi; 2)gidra; 3)lantsetnik; 4)baliq; a)to’rsimon nerv hujayralari; b)qorin nerv zanjiri, halqum atrofi nerv halqasi; c)nerv naychasi; d)bosh miya, orqa miya

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