What is produced by the fusion of a male gamete and a female gamete?

Why are budding,fragmentation,and regeneration all considered as asexual types of reproduction? With neat diagrams,explain the process of regeneration in Planaria.

Some plants do not produce seeds. For such plants,parts like roots,stem,and leaves are used to develop into new plants.
$(a)$ Identify the process.
$(b)$ Which type of reproduction is it—sexual or asexual? Answer with reason.
$(c)$ Give any two examples of this process.

Give two differences between a male and a female gamete.

Name the type of cells which undergo regeneration.

$(a)$ Name the parts labelled as $A, B, C$ and $D$ in the diagram given below:
$(b)$ What is pollination? State its significance.
$(c)$ How does fertilization occur in flowers? Name the parts of the flower that develop into $(i)$ seed,and $(ii)$ fruit after fertilization.