How are the treatises prepared by $Bentham$ and $Hooker$ useful in the field of botany?

What can be obtained through research on plants in a botanical garden?

Arrange the following steps for the preservation of plant specimens in a herbarium in the correct sequential order: $P$: Mounting,$Q$: Drying,$R$: Labeling,$S$: Poisoning,$T$: Collection of plant specimens,$U$: Pressing.

Select the correct match:

Column $I$	Column $II$
$a.$ Ex-situ conservation	$(i)$ Central National Herbarium
$b.$ Quick referral system	$(ii)$ Museum
$c.$ Preserved plants and animals	$(iii)$ Flora
$d.$ Actual account of habitat and distribution of plants of a given area	$(iv)$ Royal Botanical Gardens,Kew

Which structures are created in a botanical garden to provide a specialized environment for the cultivation of plants from other regions?

Which of the following provides facilities for botanical taxonomic research?