9-sinf. O`zbekistonning turli viloyatidagi biologiya o`qituvchilari tomonidan tuzilgan testlar

Sun’iy (I) va tabiiy (II) partenogenez jarayoni sodir

bo’ladigan organizmlarni moslab ko’rsating.

1) burchoqdoshlar oilasi; 2) baliqlarda; 3) tut ipak

qurtida; 4) zambrug’larda; 5) tustovuqda; 6) dafniya;

7) trutenlar; 8) o’simlik shira bitlarida;

A) I-1,2,3,4; II-5,6,7,8; B) I-1,3,5,7; II-2,4,6,8;

C) I-2,4,6,8; II-1,3,5,7; D) I-5,6,7,8; II-1,2,3,4;

22. 
    Submetasentrik (a) akrosentrik (b)
    metasentrik (c)
    Yuqoridagi terminlarga mos ma’lumotlarni aniqlang.
    1) teng yelkali; 2) bitta yelkasi ikkinchisisdan uzunroq; 3) bitta yelkasi juda uzun, ikkinchisi juda kalta;
    

A) a-3; b-1; c-2; B) a-2; b-3; c-1;
C) a-1; b-2; c-3; D) a-3; b-2; c-1;

23. 
    Xromosoma atamasini fanga kiritgan (a) va birinchi marta aniqlagan (b) olimlarni toping.
    A) a-Strasburger; b-Fleming, Valdeyer;
    B) a-Vinogradskiy; b-Strasburger, Fleming;