This metapackage will install Debian Science packages related to Biology. You might also be interested in the field::biology debtag.
This metapackage makes use of the packages med-bio and med-bio-dev (for development of biological applications) which are maintained by Debian Med - another Debian Pure Blend. If you are a biologist you are most probably interested in the Debian Med project which deals with biology and medicine in much more detail then the more general Debian Science.