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Biology-10th How do Organisms Reproduce? CBSE Board 2025 Medium

(i) Define placenta. State the structure and role of placenta in the development of embryo in human beings. (…

  1. (i)Define placenta. State the structure and role of placenta in the development of embryo in human beings.
  2. (ii)List three categories of contraceptives and give one example of each.

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