Which part of the plant is the reproductive organ?

"The chromosomal number of the sexually reproducing parents and their offspring is the same." Justify this statement.

Can we find variations in an asexually reproducing organism like bacteria? Write yes or no and give a reason in support of your answer.

By which method does asexual reproduction occur in fungi like $Mucor$ and $Rhizopus$?

In the given figure,label the parts and mention their functions:
$(a)$ Production of egg
$(b)$ Site of fertilisation
$(c)$ Site of implantation
$(d)$ Entry of the sperms

In human females,an event that reflects the onset of the reproductive phase is: