The epidermis aids in the regulation of gas exchange. Leaf Base: This is the part where a leaf attaches to the stem. The structure of a leaf is described below in detail : Parts of a Leaf. It is mostly found above the ground and remains attached to the stem. It is … So, the correct answer is ‘Petiole’ Q2. Model 2 — Cross Section of the Internal Structure of a Leaf Cuticle Upper epidermis Chloroplast palisade mesophyll Air Space Lower epidermis Vein Spongy mesophyll Cuticle Guard cell f Stoma 8. In petiolate leaves, the leaf stalk is long. Click Create Assignment to assign this modality to your LMS. Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). Describes the structure and function of leaves. : petiole - a leaf stalk; it attaches the leaf to the plant. MEMORY METER. (ii) Leaf-blade is enriched with reticulate venation. Anatomy of Monocot Leaf 2. The upper layer of a leaf is called the upper epidermis. It is the structure through which products of photosynthesis are moved from leaves to the entire plant. Structure of a Typical Leaf. The stalk of leaf is called A. Sessile B. Plumule C. Stipule D. Petiole. Two epidermal […] Generally, leaf base, petiole, and lamina, together form the main parts of a leaf. Q1. They absorb sunlight energy to make food. Describes how leaves are made of several different kinds of specialized tissues. (iii) Mesophyll tissue is present and is composed of palisade parenchyma and spongy parenchyma. Epidermis. Some leaves are attached to the plant stem by a petiole. They are the plant’s food factories. The types are: 1. ADVERTISEMENTS: The following points highlight the top two types of monocot and dicot leafs. Anatomy of Dicot Leaf. Leaf Structure and Function. The internal structure of a leaf: Leaves are very important structures. epidermis, mesophyll, and vascular bundle. The presence of pigment ‘chlorophyll’ makes the leaf green in color that helps to prepare food in plants through photosynthesis.Collectively, green … Blade – the main collecting structure of the leaf; Has a large, broad surface Has many layers which help the plant move and store photosynthetic materials and by - products Answers: Petiole is the stalk of a leaf that attaches the blade to the stem. Under a powerful microscope, we can see three main internal parts of a leaf, i.e. A leaf is a plant organ that is flat, thin and usually green in color. Leaf Structure and Function. List the la ers of the leaf starting at the upper cuticle all the way to the lower cuticle. Monocot and Dicot Leaf: Type # 1. shows prominent ridges and grooves and reveals the following tissues: Epidermis: 1. lamina - the blade of a leaf. The internal structure of cacti stems conforms to the pattern of broad-leaved angiosperms; a cambium layer of dividing cells, located between the woody inner tissues and those near the outside of the stem, is present. cv+ìcÏe V lìsaåe pvsophy//4— veins a-f-ffo¿s ! axil - the angle between the upper side of the stem and a leaf or petiole. Leaf base has two small leaf-like structure called stipules. Anatomy of Monocot Leaf: Triticum-Leaf: ADVERTISEMENTS: T.S. It consists of the upper and lower epidermis, which are present on either side of the leaf. Each leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf. The outermost layer of the leaf is the epidermis. % Progress . Identifying characteristics of the internal structure of dorsiventral or dicot leaf: (i) It is green, compressed with a wide lamina. stem - (also called the axis) the main support of the plant. midrib - the central rib of a leaf - it is usually continuous with the petiole. Petiole – is known as the leaf stem; It is not exactly like a stem, but it does hold xylem & phloem; Holds the blade away from the stem 7. leaf apex - the outer end of a leaf; the end that is opposite the petiole.
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