Which system is used for the arrangement of herbarium sheets?

Which of the following is associated with a zoological park?

Which of the following are true about the taxonomical aid 'key'?
$(a)$ Keys are based on the similarities and dissimilarities.
$(b)$ Key is analytical in nature.
$(c)$ Keys are based on the contrasting characters in pair called couplet.
$(d)$ Same key can be used for all taxonomic categories.
$(e)$ Each statement in the key is called Lead.
Choose the most appropriate answer from the options given below:

Which of the following is a famous museum?

Which of the following organisms can be preserved by the stuffing method?

Which one of the following taxonomical aids is used for the identification of plants and animals based on similarities and dissimilarities?