Where will you get spiny stipules for protection against grazing animals?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Thalamiflorae	$(P)$ Ovary inferior
$(2)$ Inferae	$(Q)$ Always two carpels
$(3)$ Disciflorae	$(R)$ $6$ cohorts and many families
$(4)$ Bicarpellatae	$(S)$ Citrus limon

Which type of placentation is found in primrose and lemon,respectively?

Colchicine:
$I.$ is obtained from $Colchicum \text{ } autumnale$
$II.$ is a cytokinesis inhibitor
$III.$ induces polyploidy
$IV.$ is obtained from $Fabaceae$ family
$V.$ Floral formula: $\oplus \text{ } \text{O} \text{ } P_{3+3} A_{3+3} G_{(3)}$
Which are the correct statements?

Vertical transmission of mycoplasmal diseases in plants may occur through which of the following?

Distinguish between the following: Stem hair and root hair.