Tuxumdonda urug'lanish jarayoni sodir bo'lganidan so'ng tuxum hujayra bachadon.,-■ nayiga o'tib, rivojlanishni davom ettiradi

(98-8-43) Hujayra bo'linishining qaysl bosqichida DNK sintezi amalga oshadl?

A) profaza B) interfaza

C) metafaza D) anafaza

5. 
   barchasida
   

2. 
   (98-8-44) Mitozning biologik ahamiyatini belgilang.
   

1. 
   hujayra sonining tez kamayishi
   
2. 
   hujayraning o'sishini ta'minlash
   
3. 
   xrgmosomalar sonining qiz hujayralarga teng taqsimlanishi
   
4. 
   xromosomalar sonining qiz hujayralarga teng taqsimlanmasligi
   
5. 
   barcha javoblar to'g'ri
   

3. 
   (98-12-55) Qaysi organizmlarda mitoz kuzatilmaydi?
   

1) bakteriyalar; 2) yashil suvo'tlar; 3) ko'k- yashil suvo'tlar; 4) amyobalar; 5) infuzoriyalar;

6. 
   sianobakteriyalar; 7) xlorella.
   

A)1,2, 4 B)1,3, 5 C)1,3, 6

4. 
   2, 4, 7 E)2, 5, 6
   

4.