Each statement in the taxonomic key is called a ........

What is a herbarium sheet?

Where is the Trivandrum Zoological Park located?

How does a botanical garden differ from a public park or a public garden?

Study the following statements and select the correct description of botanical garden.
$(i)$ Plant species are grown for identification purposes.
$(ii)$ Labeling of each plant consists of its botanical name/scientific name and its family.
$(iii)$ Specimens are preserved in the jars and containers.
$(iv)$ It is a type of storehouse which contains dried,pressed and preserved plant specimens on sheets.

Regional floras are prepared with the help of reference works of which scientists?