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Laternal line system of sense organs present in the skin of tadpole larva

A. completely disappears during metamorphosis

B. partialy retained during metamorphosis

C. partially disappears during later stages of metamorphosis

D. fully retained in the adult frog

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  1. Human egg is
  2. Antifertilizin is secreted by
  3. In frog, gastrulation is completed by
  4. Mammalian placenta is
  5. Which of the following do not show parental care over their young ones ?
  6. In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process…
  7. The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
  8. Sexual reproduction in larval condition is known as
  9. Cleidoic eggs are found in
  10. Human beings are
  11. Which one has the capacity to reproduce without fertilization of eggs ?
  12. In the human female, the primary oocytes remain small without any growth for
  13. Constructive change in the development of frog from tadpole is
  14. If an unfertilized frog's egg is pricked with a micro-needle, it will
  15. In the growing oocyte, the nucleus enlarges in size due to an increase in
  16. In forg, the sperms released from the testis take the following route to reach the ureter:
  17. The expulsion of completely developed foetus from the uterus is known as
  18. Embryo sac in a hen's egg is formed by
  19. The nervous system, epidermis and hairs and nails are derivatives of
  20. During normal development the activation of the egg is achieved by
  21. How many cleavages are completed in 16 cell stages of frog's egg ?
  22. The first phase in the sexual reproduction of organisms is
  23. During fertilization the spermatozoa penetrate through the egg membranes with the help of
  24. During the development of frog, the ar-chenteron is formed in
  25. During cleavage, the embryo
  26. Oogonia entering the growth phase of oogenesis is called
  27. For fertilization of the frog's egg
  28. In frog's egg the divisoin is
  29. Grey cresent is present in
  30. Which of the following develops from ectoderm ?