Congo-Brazzaville (1) Congo-Kinshasa (1) Instruction and study (1) Preservation (1) Conservation (1) Parts (1) Implements (1) Communication (1) Instruments (1) Parts (1) Plant diversity (1) Landolphia (1) Sapotaceae (1) Biodiversity (1) Primitive societies (1) Seeds (1) Plants (1) Mechanical movements (1) Human beings (1) Latex (1) Glutamic acid (1) Ficus (Plants) (1) Example (1) Evidence (1) Communities (1) Commercial products (1) Cold (1) Animal calls (1) Birds (1) Knowledge and learning (1)