Test Molluskalarning tana bo’shlig’i qanday modda bilan to’lgan

a)Nerv stvolidan b)Uch juft nerv tuguni c)Uch nerv tuguni d)Ikki ta yirik nerv tugunidan
25.Suv shillig’ining jigari ishlab chiqaradigan hazm shirasi qaysi organga qo’yiladi
a)halqum b)ingichka ichak c)oshqozon d)yo’g’on ichak
26.Yuragi ikki kamerali, buyragi tasmasimon hayvonlar guruhini aniqlang
a)yomg’ir chuvalchangi, nereida b)nereida, qizil chuvalchang c)suv shillig’i, biriniya d)tirik tug’ar, dengiz o’troq ko’p tuklisi
27.Boshoyoqli molluskalarning nima bilan oziqlanishini ko’rsating
1.krab 2.dafniya 3.molluska 4.siklop 5.baliq 6.mayda suv hayvonlari
a)1.3.5 b)2.4.6 c)1.2.3 d)4.5.6
28.Qorinoyoqli (a), ikki pallali (b), va boshoyoqli (d), molluskalarning gavdasi qanday bo’limlardan iborat
1.bosh 2.tana 3.qorin 4.oyoq
a)a.1.2.4 b.2.4 d.1.2 b)a.1.3.4 b.3.4 d.1.2 c)a.1.2.4 b.2.4 d.1.3 d)a.1.3.4 b.2.4 d.1.2
29.Ikki pallalilar va bosh oyoqli molluskalarning kattaligini ko’rsating
a)10-15 sm va 1 m dan 5 m gacha b)20-30 sm va 1 sm dan 5 m gacha c)10-15 sm va 1 sm dan 5 m gacha d)20-30 sm va 1 sm dan 3 m gacha bo’ladi
30.Qorinoyoqli (a), ikki pallali (b), va boshoyoqli (d), molluskalarning tarqalishini ko’rsating
1.10000 2.30 ming 3.3000 4.650 5.100 ming
a)a.1 b.2 d.4 b)a.5 b.3 d.4 c)a.5 b.2 d.4 d)a.1 b.3 d.4
31.Qorinoyoqli (a), ikki pallali (b), va boshoyoqli (d), molluskalarning paypaslagichlari bilan juftlab ko’rsating
1.2 ta 2.4 ta 3.8-10 ta 4.2 juft 5.bir juft 6.4-5 juft
a)a.1 b.1 d.3 b)a.4 b.4 d.6 c)a.1 b.4 d.6 d)a.4 b.2 d.6
32.Qaysi molluskalar go’shti uchun ovlanadi
1.ustritsa 2.marvariddor 3.taroqcha 4.dreysena 5.midiya 6.perlovitsa
a)1.2.5 b)2 c)3.5.6 d)1.5.3
33.Qaysi molluskalar ayrim mamlakatlarda ko’paytiriladi
1.ustritsa 2.marvariddor 3.taroqcha 4.dreysena 5.midiya 6.perlovitsa