Which one of the following is not a correct statement?

Museums have collections of preserved plant and animal specimens for study and reference. Plant and animal specimens may also be preserved as dry specimens. Insects are preserved in insect boxes after collecting, killing and pinning. Larger animals, like birds and mammals, are usually stuffed and preserved. Museums
often have collections of skeletons of animals too. 

(2) Key is a taxonomic aid for identification of specimens. Keys are generally analytical in nature. 

(3) Herbarium houses dried, pressed and preserved plant specimens. The herbarium sheets also carry a label providing information about date and place of collection, English, local and botanical names, family, collector’s name etc. 

(4) Botanical gardens are specialized gardens that have collections of living plants for reference. Plant species in these gardens are grown for identification purposes and each plant is labelled, indicating its botanical scientific name and its family.