How does vegetative propagation occur in Agave?

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Clone	$(1)$ Agamospermy
$(B)$ Plant apomixis	$(2)$ Scion
$(C)$ Grafting	$(3)$ Callus
$(D)$ Tissue culture	$(4)$ Flower
$(E)$ Inflorescence	$(5)$ Ramet

What is the nature of male gametes in angiosperms?

Match the following columns regarding the chromosome number in meiocytes $(2n)$ of different organisms:
| Column-$I$ (Organism) | Column-$II$ (Chromosome number in meiocyte) |
| :--- | :--- |
| $p$. Ophioglossum | $v$. $20$ |
| $q$. Apple | $w$. $34$ |
| $r$. Rice | $x$. $24$ |
| $s$. Maize | $y$. $42$ |
| | $z$. $1260$ |

Identify the correct sequence of events in the life cycle of a flowering plant.

Match the following columns:

Column-$I$	Column-$II$
$(a)$ $PEN$	$(1)$ Heart-shaped stage
$(b)$ $PEC$	$(2)$ Coconut water
$(c)$ Cotyledon	$(3)$ White kernel of coconut
$(d)$ Dicot embryo	$(4)$ Scutellum