For other uses, see API (disambiguation). In computer programming, an Application Programming Interface (API) is a set of subroutine definitions, protocols, and tools for building application software. In general terms, it is a set of clearly defined methods of communication between various software components.
7. epidermis. The epidermis cells (from the Greek ÎµÏÎ¯Î´ÎµÏÎ¼Î¯Î´Î±, 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.tomata are holes in the plant epidermis that are surrounded by two guard cells, which control the opening and closing of the aperture. These guard cells are in turn surrounded by subsidiary cells which provide a supporting role for the guard cells. Stomata begin as stomatal meristemoids.
9.1.3 Explain the relationship between the distribution of tissues in the leaf and the functions of these tissues. Upper epidermis-Consists of a single layer of cells found on the upper surface of the leaf. It is covered by a thick waxy cuticle.The main function of the upper epidermis is water conservation.It prevents the loss of water from the upper surface where the light intensity and heat are the greatest.pongy mesophyll-Made up of loosely packed cells. This tissue is found in the lower half of the leaf (lower surface) and has few chloroplasts. It provides gas exchange (CO 2 uptake and O 2 release) and therefore needs to be close to the stomata found in the lower epidermis.