Three Ways to Order Your Science Supplies

Online - Pay by credit card, check or your account.

By Phone - Call us at 800.628.7748
Mon.- Thurs. 7:30 -4:00 pm EST, Fri.7:30-3:00 EST


By Fax - Fax your order with our
pdf form.

Ecological Relationships


When two species in a community interact, the results can be beneficial, harmful, or neutral. This mount shows 6 pairs of organisms whose interactions illustrate cooperative mutualism, obligatory mutualism, commensalism, parasitism, competition, and neutralism. 12" x 16".

Go back