Editing Test tube (section)

===Biosciences===
Culture tubes are test tubes used in [[biology]] and related sciences for handling and culturing all kinds of live [[organisms]], such as [[Mold (fungus)|molds]], [[bacteria]], [[seedling]]s, [[cutting (plant)|plant cutting]]s, etc..  Some racks for culture tubes are designed to hold the tubes in a nearly horizontal position, so as to maximize the surface of the [[culture medium]] inside.

Culture tubes for biology are usually made of clear plastic (such as [[polystyrene]] or [[polypropylene]]) by [[injection molding]]<ref>{{cite book |author1=M. Jeremy Ashcraft |author2=General Manager |author3=Lake Charles Manufacturing | title=Test Tube Molding Process: A discussion on the molding of plastic test tubes |publisher=Lake Charles Manufacturing |year=2007}}</ref> and are often discarded after use. Plastic test tubes with a screwtop cap are often called "Falcon tubes" after a line manufactured by [[Becton Dickinson]].<ref name="BD Falcon Tubes and Pipets">{{cite web |title=BD Falcon Tubes and Pipets |url=https://www.bdbiosciences.com/documents/tube_pipet_brochure.pdf |publisher=[[Becton Dickinson]] |access-date=14 March 2016}}</ref>

Some sources consider that the presence of a lip is what distinguishes a test tube from a culture tube.<ref>Thomas Scott (transl., 1996), ''Concise Encyclopedia: Biology''. Walter de Gruyter. {{ISBN|3-11-010661-2}}, {{ISBN|978-3-11-010661-9}}. 1287 pages.</ref>