Caution: Crossposting is good for usenet readers of bionet groups.
However it is bad for those that receive these messages via one of the
BioSci mailing lists. The usenet software only transmits one copy of
the message eventhough it can be read in several newsgroups. This is
the source of the problem with the mailing lists. The mailing list
corresponding to the first newsgroup stated for a posting gets the
message. The second and any following groups will only be available to
the usenet readers and not to the mailing list readers. Thus this
message (which was posted to: bionet.general, bionet.plants, and
bionet.arabidopsis) will be received by the mailing list for
bionet.general while the bionet.plants and bionet.arabidopsis mailing
lists will not.
I'd guess that those reading the Plants and Arabidopsis mailing lists
represent a large percentage of the total readers of the group. This
is probably true for several other bionet groups as well. Thus it is
my recommendation that crossposting should not be used.