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STD 12 - 2. human reproduction — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 2. human reproduction1 Mark
MCQ
Which of the following organ is differentiated first during development ?
  • ✓
    Heart
  • B
    Skin
  • C
    Brain
  • D
    Neural tube
✓

Answer

Correct option: A.
Heart
a
In human beings, after one month of pregnancy, the embryo's heart is formed. By the end of second month of pregnancy limbs and digits are developed. By the end of $12$ weeks (first trimester) most of the major organ systems are formed.

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