The railroad superintendent daniel McCallum used the model of a tree, with roots, trunk, branches, and leaves, to illustrate the table of organization of the company.
Leaves are collectively called leaves, as in "autumn leaves", but leaves, stems, flowers, and fruits collectively form a scion system. Leaf, in botany, is a green growth usually flattened from the stem of vascular plants. As the primary locus of photosynthesis, leaves produce food for plants and ultimately nourish and sustain all land animals. Leaves are botanically an integral part of the stem system.
Leaves provide food and air to maintain plant health and growth. Leaves convert light energy into food through photosynthesis. Through pores and stomata, leaves “breathe” carbon dioxide and “exhale” oxygen. The singular form of leaf is "leaf". Example: A leaf fell from a tree and hit the bedside window.
Learn more about leaves here
https://brainly.com/question/1779328
#SPJ4
