Which of the following organisms does not reproduce by binary fission?

Which among the following statements are true for sexual reproduction in flowering plants?
$(i)$ It requires two types of gametes
$(ii)$ Fertilisation is a compulsory event
$(iii)$ It always results in formation of zygote
$(iv)$ Offspring formed are clones

Distinguish between a gamete and zygote. Explain their roles in sexual reproduction.

What is the process of release of an ovum from the ovary called?

What happens when the following situations are initiated:
$(a)$ $A$ $Planaria$ is cut into three different pieces.
$(b)$ $A$ leaf of the $Bryophyllum$ with notches falls on the soil.
$(c)$ Testosterone is released in the male reproductive system.

Factors responsible for the rapid spread of bread mould on slices of bread are:
$(i)$ Large number of spores
$(ii)$ Availability of moisture and nutrients in bread
$(iii)$ Presence of tubular branched hyphae
$(iv)$ Formation of round shaped sporangia