Answer with explaining the reason behind the option you choose.
Dear student,
19. All of the above. This is because gastrulation and embryogenesis involves cleavage. Moreover, only after development of embryo the animal develops. Thus option 4 is correct.
20. The vegetal pole contains large yolky cells. Nucleus is present at the animal pole whereas there is presence of most of the yolk in the vegetal pole Thus option 2 is correct.
Regards
19. All of the above. This is because gastrulation and embryogenesis involves cleavage. Moreover, only after development of embryo the animal develops. Thus option 4 is correct.
20. The vegetal pole contains large yolky cells. Nucleus is present at the animal pole whereas there is presence of most of the yolk in the vegetal pole Thus option 2 is correct.
Regards