Which contraceptive device is used only by males?

The correct sequence of reproductive stages seen in flowering plants is

$(a)$ Identify the asexual method of reproduction in each of the following organisms:
$(i)$ Rose
$(ii)$ Yeast
$(iii)$ Planaria
$(b)$ What is fragmentation? Name a multicellular organism which reproduces by this method.

Which kind of contraceptive methods prevents $STDs$ and how?

Which of the following organisms undergoes binary fission?

Explain the process of regeneration in $Planaria$. How is this process different from reproduction?