Question answer
1. How plant get crucial role?
2. Define a typical leaf?
3. What is leaf base?
4. What is petiole?
5. What is leaf blade?
6. What is stipules ?
7. What is the function of stomata?
8. Define midrib?
9. State the function veins and veilets?
10. Explain the type of leaf?
11. What is venation?
12. Explain the types of venation?
Answers
2)Typically, a leaf consists of a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. In angiosperms leaves commonly have a pair of structures known as stipules, which are located on each side of the leaf base and may resemble scales, spines, glands, or leaflike structures.
3)The leaf base is the slightly expanded area where the leaf attaches to the stem. ... petiole, when present, and the leaf base become thickened, and often the latter expands laterally and fully or partially encloses the stem.
4)In botany, the petiole is the stalk that attaches the leaf blade to the stem, and is able to twist the leaf to face the sun. This gives a characteristic foliage arrangement to the plant. Outgrowths appearing on each side of the petiole in some species are called stipules.
5) leaf is the principal lateral appendage of the vascular plant stem, usually borne above ground and specialized for photosynthesis. The leaves and stem together form the shoot. Leaves are collectively referred to as foliage, as in "autumn foliage".
6)In botany, a stipule is an outgrowth borne on either side of the base of a leafstalk. A pair of stipules is considered part of the anatomy of the leaf of a typical flowering plant, although in many species the stipules are inconspicuous or entirely absent.
7)Stomata are small pores on the surfaces of leaves and stems, bounded by a pair of guard cells, that control the exchange of gases—most importantly water vapour and CO2—between the interior of the leaf and the atmosphere
8)The midvein, or midrib. The smaller lateral veins of the leaf are initiated near the leaf tip; subsequent major lateral veins are initiated sequentially toward the base, following the overall pattern of leaf development. A major lateral vein may have one or more orders of smaller veins.
9)Veins contain the vascular tissue and act as channel for the transport of food, water and minerals. These veins also function as skeleton of lamina. The arrangement and distribution of veins and veinlets in the leaf lamina is called venation. There are two main types of venation: Reticulate and Parallel.
10)There are three main parts of a leaf – Leaf base, leaf lamina, and petiole. There are two different types of leaves – simples leaves and compound leaves. The other types of leaves include acicular, linear, lanceolate, orbicular, elliptical, oblique, centric cordate, etc
11)the arrangement of veins in a leaf or in an insect's wing.
the system of venous blood vessels in an animal.
12)Venation is the phenomenon of arrangement of veins in the lamina of the leaf surface. It is of three types, reticulate, parallel and furcate venation. In reticulate venation, veins form the network like structure.
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