Which one of the following statements about human sperm is correct?
Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation.
The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Acrosome serves as a sensory structure leading the sperm towards the ovum.
Acrosome serves no particular function.
In indeterminate cleavage the fate of blastomeres is fixed at which of the following stage
Where does the first cleavage division of zygote take place ?
Assertion : In morula stage, cells divide without increase in size.
Reason : Zona pellucida remains undivided till cleavage is complete.
Implantation is the process of
What happens during fertilization in humans after many sperms reach close to the ovum?