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In frog, gastrulation is completed by

A. epiboly

B. emboly

C. both and

D. delamination

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  1. Which of the following develops from ectoderm ?
  2. In the human female, the primary oocytes remain small without any growth for
  3. The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
  4. Which of the following do not show parental care over their young ones ?
  5. Oral contraceptives check
  6. The substance fertilizin is secreted by
  7. During metamorphosis, the disappearance of larval organs is called
  8. During cleavage, the embryo
  9. In frog, gastrulation is completed by
  10. For fertilization of the frog's egg
  11. Antifertilizin is secreted by
  12. The expulsion of completely developed foetus from the uterus is known as
  13. Development of egg without fertilization is termed as
  14. Spermatoliosis is a process by which
  15. When the eggs are released from the ovary of frogs they are at the
  16. During fertilization the spermatozoa penetrate through the egg membranes with the help of
  17. A true coelom is covered by
  18. Grey cresent is present in
  19. Which one has the capacity to reproduce without fertilization of eggs ?
  20. The process of synthesis of yolk by the oocyte is termed
  21. Blastopore in frogs development occurs in
  22. The allantoic vesicle arises from
  23. The intestine of tadpole is
  24. In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process…
  25. The nervous system, epidermis and hairs and nails are derivatives of
  26. A freshly unfertilised egg of hen contains
  27. The cellular movements during gastrula-tion are called
  28. Human beings are
  29. Constructive change in the development of frog from tadpole is
  30. Embryo sac in a hen's egg is formed by