Examlex
The transitional stage in Frank Notestein's demographic model is initiated by ______________
Pigments
Substances that give color to tissues, cells, and materials by absorbing certain wavelengths of light and reflecting others.
Extracellular
Located or occurring outside a cell or cells, often referring to substances or fluids in the spaces between cells.
Signaling Molecules
Chemicals that are involved in transmitting information between cells, allowing for processes such as growth, immune response, and neurotransmission.
Hormones
Chemical substances produced in the body that regulate and control the activity of certain cells or organs.
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