Bio materials are a type of resource. They are most commonly acquired by hunting the native wildlife of the Heleus cluster. Some may be sold by merchants as well.
In the table below, the total required amount for each bio material listed is the amount of that resource to develop one copy of every Tier for all of the items listed. This gives a general guideline of how much a bio material is used and how much you may need. If you develop additional copies then of course the requirement will be higher than the listed amount. Refer to each individual resource page for details on the specific items that can be developed.