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2.Human Reproduction
normal
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
Animal $\quad$ Gestation period
A
Dog $60$ $\quad$ - $65$ days
B
Elephant $607$ $\quad$ - $641$ days
C
Cat $52$ - $65$ days
D
Cow $330$ - $345$ days
Solution
Cow’s gestation period = $279\; to \;292$ days.
Standard 12
Biology
