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

(v13-114-11) Lansetnik embrionidagi blastomerlar 128 taga yetishi uchun hujayralar necha marta meridianal va ekvatorial bo'linish kerak?

A)5va3 B)4va2

C)4va3 D)2va1

39. 
    (v13-118-22) Lansetnik embrionidagi blastomeriar 8 taga yetishi uchun hujayralar necha marta meridianal va ekvatorial bo'linish kerak?
    

A) 2 va 1 B) 5 va 3

C) 4 va 2 D) 4 va 3

40. 
    (v13-123-10) Ontogenez embrional rivojlanish bosqichida lansetnik murtak varaqasining ektodermasidan (l), entodermasidan (II), mezodermasidan (III) hosil bo'ladigan organlarni ajrating.
    

1) neyronlar; 2) sezish retseptori; 3) o'pka alveolalari; 4) tuxumdon; 5) eritrotsitlar; 6) teri burmalari; 7) yirik tomirlar; 8) halqum.

1. 
   I-2, 6, 8; II-3, 4; III-5, 7
   
2. 
   1-1, 2, 6; II-8; III-4, 5,7
   
3. 
   1-1,2, 3; il-6, 7; Hl-4, 5
   
4. 
   l-1,2,6;ll-3,4, 8; 111-5,-7
   

41.