2. Barg necha qismdan tashkil topganini aniqlang?

15. Ikki pallali o’simliklarning bargi qanday tomirlangan?

A) yoysimon tomirlanish

B) parallel tomirlanish

C) to’rsimon tomirlanish

D) A va S

16. Parallel yoki yoysimon tomirlanishli barglarga ega bo’lgan o’simliklarga misollar keltiring.

A) Olma, o’rik, nok, terak, yong’oq, anjir, g’umay

B) Bug’doy, arpa, makkajuxori, oqjuxori, g’umay,kamxastak,maymunjon

C) Bug’doy, arpa, makkajuxori, oqjuxori, g’umay

D) Terak, chinor, olma, o’rik, nok, yalpiz, g’o’za, arpa

17. Bir pallali o’simliklar bargi qanday tomirlanishga ega bo’ladi?

A) yoysimon tomirlani B) parallel tomirlanish

C) to’rsimon tomirlanish D) parallel yoki yoysimon tomirlanish

18. Barg tomirlarining asosiy vazifasi nimadan iborat?

A) oziq modalarni o’tkazish

B) bargga mustaxkamlik berish

C) poyadan kelayotgan suv va unda erigan oziq moddalar barglarga va barglarda hosil bo’lgan organik moddalar poyaga o’tkazish, hamda bargga mustaxkamlik berish

D) vegetativ ko’payishda ishtirok etish