In the process of grafting,what is the term for the rooted plant part that is fixed in the soil?

In human females, where does the fertilization of the ovum by the sperm take place?

In human males,the testes lie in the scrotum,because it helps in the

In the process of grafting,what is the name given to the part of the plant that is attached to the cut stem of another plant?

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

In the diagram of the human male reproductive system given below:
$(a)$ Label parts $A$ and $B$.
$(b)$ Name the hormone produced by organ $X$. What is the role of this hormone in the human male?
$(c)$ Mention the name of substances that are transported by tubes:
$(i)$ $C$ and $(ii)$ $D$.