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A leaf ( pl.: leaves) is a principal appendage of the stem of a vascular plant, [ 1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [ 2][ 3] while the leaves, stem, flower, and fruit collectively form the shoot system. [ 4]
John Ray (1674), pp. 164, 166 Since this paper appeared a year before the publication of Malpighi's Anatome Plantarum (1675–1679), Ray has the priority. At the time, Ray did not fully realise the importance of his discovery but progressively developed this over successive publications. And since these were in Latin, "seed leaves" became folia seminalia and then cotyledon, following Malpighi ...
The epidermis (from the Greek ἐπιδερμίς, meaning "over-skin") is a single layer of cells that covers the leaves, flowers, roots and stems of plants. It forms a boundary between the plant and the external environment. The epidermis serves several functions: it protects against water loss, regulates gas exchange, secretes metabolic ...
A decision tree is a flowchart -like structure in which each internal node represents a "test" on an attribute (e.g. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (decision taken after computing all attributes). The paths from root to leaf represent ...
Artists' charcoal is charcoal used as a dry art medium. Both compressed charcoal (held together by a gum or wax binder) and charcoal sticks (wooden sticks burned in a kiln without air) are used. [1] The marks it leaves behind on paper are much less permanent than with other media such as graphite, and so lines can easily be erased and blended ...
1) An increased rate of evaporation due to a temperature rise will hasten the loss of water. 2) Decreased relativehumidity outside the leaf will increase the water potential gradient. Relative humidity. Drier surroundings give a steeper water potential gradient, and so increase the rate of transpiration. Wind.
leaf base. Triangular, wedge-shaped, stem attaches to point. cuneiform. whole leaf. Narrowly triangular, widest on the opposite end from the stem, with the corners at that end rounded. cuspidate. cuspidatus. leaf tip. With a sharp, elongated, rigid tip; tipped with a cusp.
In computer science, a tree is a widely used abstract data type that represents a hierarchical tree structure with a set of connected nodes. Each node in the tree can be connected to many children (depending on the type of tree), but must be connected to exactly one parent, [ 1] except for the root node, which has no parent (i.e., the root node ...