During cleavage $DNA$ synthesis
Faster than typical mitosis.
Slower than typical mitosis.
Stops
Remains the same
Placenta has an outer layer which is selectively permeable and hormone secreting which is known as
In mammalian sperm, spirally arranged mitochondria are present in
If an unfertilized egg is pricked with a micro needle, it will
Identify $A, B$ and $C$ in the given human sperm diagram
Which of the following structure is lacking from the placenta