NEETZoologyHuman Reproduction
Development Stage Features A. End of First Month 1. Formation of limbs and digits B. End of Second Month 2. First fetal heart sound detectable C. End of 12 Weeks (First Trimester) 3. Most major organ systems are formed D. Fifth Month 4. First movements and appearance of hair on the head
Options
- AA -1 , B - 3, C - 4, D -2
- BA -2 , B - 3, C - 4, D -1
- CA - 2, B - 1, C - 3, D - 4
- DA -3 , B -1 , C -2 , D -4
Correct answer
C. A - 2, B - 1, C - 3, D - 4
Step-by-step solution
End of First Month: The embryo’s heart is formed, and its sound can be detected. End of Second Month: The fetus develops limbs and digits. End of 12 Weeks: Most of the major organ systems, including limbs and external genital organs, are well-formed. Fifth Month: The first movements of the fetus and the appearance of hair on the head are observed.