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During the development of frog, the ar-chenteron is formed in

A. early blastula

B. late blastula

C. early gastrula

D. lategastrula

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Which of the following does not show metamorphosis ?
  2. The nervous system, epidermis and hairs and nails are derivatives of
  3. Laternal line system of sense organs present in the skin of tadpole larva
  4. In the human female, the primary oocytes remain small without any growth for
  5. Sexual reproduction in larval condition is known as
  6. Oral contraceptives check
  7. In forg, the sperms released from the testis take the following route to reach the ureter:
  8. Which of the following do not show parental care over their young ones ?
  9. If an unfertilized frog's egg is pricked with a micro-needle, it will
  10. Metamorphosis is a characteristic feature of
  11. Human beings are
  12. In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process…
  13. How many cleavages are completed in 16 cell stages of frog's egg ?
  14. The first phase in the sexual reproduction of organisms is
  15. The formation, development and matura- j tion of the female gamete is called
  16. The substance fertilizin is secreted by
  17. Which of the following develops from ectoderm ?
  18. Blastopore in frogs development occurs in
  19. During normal development the activation of the egg is achieved by
  20. During metamorphosis, the disappearance of larval organs is called
  21. The process of synthesis of yolk by the oocyte is termed
  22. Development of egg without fertilization is termed as
  23. Which one has the capacity to reproduce without fertilization of eggs ?
  24. A freshly unfertilised egg of hen contains
  25. Constructive change in the development of frog from tadpole is
  26. Spermatoliosis is a process by which
  27. Embryo sac in a hen's egg is formed by
  28. Meroblastic cleavage is found in
  29. The formation of the neural tube is known as
  30. The intestine of tadpole is