$A$ cryptogram has got how many pairs of information?

What is established in zoological parks for the rare species of plants and animals?

Botanical gardens are used for obtaining information in which of the following fields?

Who developed the $key$ for the identification of animals?

Assertion $A$: Herbaria provide keys for preparing modern taxonomic systems.
Reason $R$: Herbaria provide facilities for taxonomic research.
Which option is correct for Assertion $A$ and Reason $R$?

In which of the following methods are plant specimens pressed,dried,and mounted on sheets of a standard size?