Exhibit 28-1 
-Plot on a scatter diagram the data from the African countries listed in Exhibit 28-1. Does there appear to be a catch-up line in the scatter diagram?
Definitions:
Cuticle
The protective layer found on the outer surface of leaves, stems, and other organs of plants.
Collenchyma
A type of plant tissue characterized by its living, elongated cells with unevenly thickened walls, providing support and flexibility.
Water and Minerals
Essential components for biological organisms, facilitating metabolic processes and structural functions.
Companion Cells
Plant cells that are intimately associated with sieve tube elements in the phloem and help in the transport of substances essential for the plant's metabolism.
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