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Embryo sac in a hen's egg is formed by

A. ectoderm

B. meso derm

C. somatic mesoderm and endoderm

D. splanchnic mesoderm and ectoderm

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  1. Antifertilizin is secreted by
  2. Human egg is
  3. Spermatoliosis is a process by which
  4. Grey cresent is present in
  5. Which of the following does not show metamorphosis ?
  6. Blastopore in frogs development occurs in
  7. During fertilization the spermatozoa penetrate through the egg membranes with the help of
  8. Embryo sac in a hen's egg is formed by
  9. Which of the following do not show parental care over their young ones ?
  10. In the human female, the primary oocytes remain small without any growth for
  11. Meroblastic cleavage is found in
  12. A freshly unfertilised egg of hen contains
  13. The expulsion of completely developed foetus from the uterus is known as
  14. How many cleavages are completed in 16 cell stages of frog's egg ?
  15. Laternal line system of sense organs present in the skin of tadpole larva
  16. Mammalian placenta is
  17. When the eggs are released from the ovary of frogs they are at the
  18. In frog, gastrulation is completed by
  19. Development of egg without fertilization is termed as
  20. A true coelom is covered by
  21. Oogonia entering the growth phase of oogenesis is called
  22. The substance fertilizin is secreted by
  23. The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
  24. Sexual reproduction in larval condition is known as
  25. The formation, development and matura- j tion of the female gamete is called
  26. For fertilization of the frog's egg
  27. In the growing oocyte, the nucleus enlarges in size due to an increase in
  28. In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process…
  29. Metamorphosis is a characteristic feature of
  30. During cleavage, the embryo