Description of Some important Families → The flowers with apocarpus ovary have more than one carpel. The placenta is a tissue, which develops along the inner wall of the ovary. 5. Cotyledon; 2. These are thread-like sensitive structures, which can coil around a support to help the plant in climbing, e.g, Wild pea (Lathyrus aphaca), Pisum sativum (sweet pea) and Gloriosa superba (glory lily). When pericarp is thick and fleshy, it is differentiated into outer epicarp, the middle mesocarp and the inner endocarp. It develops at the node and bears a bud in its axil called as the axillary bud, which later develops into a branch. If they are fused they are bracketed. It is a large family, commonly called as the ‘potato family, it is widely distributed in tropics, sub-tropics and even temperate zones. * Runners These are subaerial weak stems that grow horizontally along the soil surface, e.g., Cynadon (lawn grass), Centella (brahmi booti), Oxalis, etc. Lamina (Epipodium) (d) Tuber It is a swollen end of underground stem branches. A typical leaf has three main parts. nodes bear small scale leaves with buds in their axils, e.g., Zingiber (ginger officinale), Curcuma domestica (turmeric). A leaf having a single or undivided lamina is called simple leaf. Functions of Roots A true fruit has two parts pericarp and the seeds. iii. Multiple (Composite) Fruits CBSE Maths notes, CBSE physics notes, CBSE chemistry notes. Petiole help hold the leaf blade towards light. (c) It holds flower in suitable position, so that pollination and fertilistaion takes place. i.Dicotyledonous Seed These are thin, long and sensitive structures which can coil around a support. (ii) Absorption Roots absorb water and minerals from the soil and provide it to all parts of the body. (d) Gynoecium Bicarpellary, syncarpous, ovary superior, bilocular, placenta swollen with many ovules. (d) Tuberous Roots The primary root becomes thick and fleshy but do not attain any definite shape (irregularly-shaped), e.g., 4 O’clock plant (Mirabilis jalapd), Echinocystis lobata. A typical root contains following five regions. Modification of roots are found in both tap roots ancf adventitious roots. The outermost covering is the seed coat. vi. Draw the labelled diagram of the following: 8. Racemose Inflorescence A pair of leaves axises at each node and opposite to each other, e.g., Calotropis and Psidium guajava (guava plants). (iii) Leaf Alternate, pinnately compound or simple, leaf base, pulvinate, stipulate, venation-reticulate. (a) The most important function of leaves is photosynthesis with the help of sunlight and carbon dioxide. Gram seed is a dicot seed formed in a small pod or legume. A seed is made up of seed coats and an embryo. It is made up of units like sepals. Simple Leaves iii. It protects the root meristem from friction of the soil particles and also protect tender apex which allow the passage of root through cells, e.g., Lemna, Eichhornia. i. These essential parts consist of two kinds of (male) sporophylls, the microsporophyll (male) and the megasporophyll (female). When bud grows, the internodes become longer and the leaves spread out, resulting in the formation of a young shoot. The plant body consists of a main axis, which may be branched or unbranched bearing lateral appendages. 4. It lies partly within and partly beyond the root cap. The family—Liliaceae (lily family) includes about 250 genera and 3700 species showing world wide distribution. v. Zone of Maturation (i) Root Generally adventitious, fibrous or fleshy (e.g., Asparagus). A sterile stamen is called staminode. (f) Seeds Endospermic, embryo straight. A compound leaf can be of following two types ii. Plants belonging to this family has their importance in the following fields iv. The leaf apex is modified into a lid, e.g, Nepenthes, Dischidia and Sarracenia. Hypocotyl is a part present between the point of attachment of cotyledon and radicle. Vegetative Characters Like calyx, corolla may also be gamopetalons (petals united) or polypetalous (petals free). These are modified stems and act as climbing organs. Modification of Stem MORPHOLOGY OF FLOWERING PLANTS NOTES. The roots developing from any part of the plant other than the radicle are known as adventitious roots (L.adventitious .extraordinary). A bud is present in the axil of petiole in both simple and compound leaves but not in the axil of leaflets of the compound leaf. If a fruit is formed without fertilisation, it is called parthenocarpic fruit, e.g., Banana, grapes, pineapple, etc. (a) Fasiculated Roots These arises in clusters from the base of the stem, e.g., Dahlia, Asparagus. Functions of Stem The radicle develops into root and plumule into shoot. Revision Notes on Morphology of Flowering Plants. How do the various leaf modifications help plants? (c) Tuberous Roots (Single Root Tubers) These are swollen without any definite shape, e.g., Ipomoea batatas (sweet potato). These are of two types twiners and climbers It consists of one large shield-shaped cotyledon known as scutellum and a short axis with a plumule and a radicle. (f) Pneumatophores These are special roots that develop in mangrove plants (grow in marshy areas). INCOMMING TRAFFIC. Each anther is usually bilobed which are attached at the back by a sterile band called connective and each lobe has two chambers, the pollen sacs. The segments of the leaf modify into bladder-like structures, which trap small insects present in the water. They are of following four types The stem of some plants lie below the soil surface. It is the stalk of a leaf. The tap roots are modified for the function like storage, nitrogen-fixation and respiration. (iii) Leaves Mostly basal, alternate, linear, exstipulate with parallel venation. The leaves have many primary and secondary functions. (b) It conducts water and minerals to roots, leaves, flowers, fruits, etc. The arrangement and distribution of flowers over a plant is called inflorescence. Ovary is one chambered but it becomes two-chambered due to formation of the false septum, e.g., Mustard and Argemone. (a) Apocarpous When more than one carpel is present, they may be free are called apocarpous, e.g., Lotus and rose. Each ovary bears one or more ovules attached to a flattened, cushion like placenta. * Offsets These weak stems are one internode long, stout, slender and runs horizontally and terminates in a bud at a short distance that develops into adventitious roots, e.g., Pistia (water lettuce), Eichhomia (water hyacinth), etc. The arrangement of flowers in either basipetal (younger flowers occupy basal position, while older flowers towards the apex) or centrifugal (older towards center and younger towards periphery). Some phylloclades also store food and water. The plumule and radicle are enclosed in sheaths which are called coleoptile and coleorhiza respectively. Coloured sepals attract insects for pollination. (b) Leaves change into phyilodes to protect against transpiration. i. Anatomy of Flowering Plants Class 11 Notes Biology Chapter 6 CBSE NotesCBSE Notes Class 11 BiologyNCERT Solutions Biology This chapter introduces the internal […] Vegetable ghee is prepared by using the oils after hydrogenation. The other floral parts are borne at the top of the fused thalamus and ovary. Phyllode With the help of Notes, candidates can plan their Strategy for particular weaker section of the subject and study hard. The thalamus is the swollen end of the axis on which the floral whorls are arranged. * Twiners These are long, slender and very sensitive and coil around an upright support on coming in contact, e.g, Dolichos lab lab (bean), Clitoria (butterfly pea), Cuscuta. Subaerial Stem What is meant by modification of root? Stamens can be of different types depending on their union with other members such as petals or among themselves. The number of locules in the ovary correspond to the number of carpels in the gynoecium, i.e., unilocular (only one locule, e.g., Pea), bilocular (two locules, e.g., Tomato), trilocular (three locules, e.g., Ricinus), multilocular (many locules, e.g., Orange and lemon). iii. Vegetative Characters iii. Other medicinal plants are Solanum xanthocarpum, Withania somnifera, Hyoscymus niger, etc. (d) They protect axillary and terminal bud from mechanical injury and desiccation. (d) Stem branches provide support to its various parts. (i) The dichotomous branching occurs by the division of the apical growing point or bud into two equal parts in a forked manner. A flower arises in the axil of a leaf like structure called bract. If more than two leaves arise at a node and form a whorl, it is called whorled. Here you can read Chapter 5 of Class 11 Biology NCERT Book. The study of external features of an organism is called its morphology. (e) Stilt Roots These are small thick supporting roots growing obliquely from the basal nodes of the main stem. Revision Notes for Class 11 is a highly significant and need to be learn to do better for your Class 11 examination. e.g., Bladderwort (Utricularia). It develops from the plumule of the embryo of a germinating seed. (a) Conical Roots These are fleshy tap roots that resemble a cone (broad at the base and gradually tapering towards the apex), e.g., carrot (Daucus carotd). Storage Roots of many plants store food for the use of other plant parts and for animals. It is mentioned that even in the diversity the angiosperms have some common characteristics that include the presence of roots, stems, leaves, flowers, and fruits. The seed coat encloses the embryo, which is differentiated into a radicle, a plumule and cotyledons. (a) It bears leaves, fruits, flowers and seeds in position. 4 Vegetative Characters It helps to avoid overcrowding and provide every leaf with optimum sunshine. * Trailers (creepers) They trail along the surface and do not climb up. The arrangement of veins and veinlets in the lamina of leaf is called venation. In underground structures also a reduced, non-green stem is found, e.g., Garlic, onion and lily. (c) Gynoecium Tricarpellary, syncarpous, trilocular with many ovules, axile placentation, rarely unilocular with parietal placentation, ovary superior, style simple with three lobed stigma. iv. i. Cyathium (a) Perianth Tepal six (3 + 3), often united into tube, valvate aestivation. * Fruits developed from any part of the flower along with ovary is called false fruits. ii. (b) Fusiform Roots The primary root is spindle-shaped. Economic Importance with Examples Description of this formula is Ebracteate, actinomorphic, bisexual, bimerous, calyx-4, polysepalous, in two whorls of two each corolla-4, polypetalous, cruciform, androecium-6, polyandrous, tetradynamous in two whorls, one with two, gynoecium—bicarpellary syncarpous, superior. The ovary after these changes is known as the fruit. The adventitious roots can be further classified as following on the basis of nature of development It forms the permanent zone of the root and also gives out lateral roots from the interior part of this region, e.g., In dicots and gymnosperms. (viii) Jewellar s Weights The seeds of Abrus precatorius (ratti) are used weight by jewellars. The major functions of roots are as follows It is situated behind the meristematic region (growing point). Gynoecium is the female reproductive part of the flower and is made up of one or more carpels or megasporangium. Leaves have mainly two types of venation These develop by the modification of only stem branches of limited growth and are green (photosynthetic). During fertilisation, the important changes taking place in the ovary are Class 11th Biology – 5 Morphology of Flowering plants MCQs Most plants are green in colour because The atmosphere filters out all the colours of the visible light spectrum except green. They have minute breathing pores called pneumatophores or lenticels present on the tips of vertical roots that help in getting oxygen for respiration. (vii) Ornamentals Some common ornamental plants are Lathyrus odoratus (sweet pea), Clitoria (butterfly pea), Lupinus, etc., are common ornamental plants. Secondary Functions The notes also talk about Anatomy and Epidonomy, which are the two kinds of morphology. (d) Free central When the ovules are borne on central axis and septa are absent, the placentation is called free central, e.g., Dianthus and primrose. The lamina of a simple leaf may be incised but the incisions do not touch the midrib. Structure of Monocotyledonous Seed This is possible only when you have the best CBSE Class 11 Biology study material and a smart preparation plan. called acropetal succession. Symbols for Number of Floral Parts Hypanthodium These roots function as haustoria, e.g., Cuscuta (dodder). Tendrils can be of following types on the basis of their origin (d) Axillary Arise from axiallary buds, e.g., Passiflora (passion flower). Stems perform various primary and secondary functions. The various forms of aerial stem modification are following An aggregate fruit is a group of fruitlets which develops from a flower having polycarpellary apocarpous (free) gynoecium. Morphology of Flowering Plants MCQ With Answers PDF. (ix) Medicinal Plants The flowers of Trifolium pratense are used in whooping cough. One can study NCERT Revision Notes of Class 11 from studrankerstest.com. Pericarp Actinomorphic Some examples are given below 1. (v) They protect immature seeds against climatic conditions till their maturity. Epigynous Flower 4. Epicotyle is present between point of attachment of cotyledons and plumule. (iii) Leaf In vegetative parts alternate and floral regions opposite, exstipulate, simple, rarely pinnately compound as in potato and tomato. (а) Marginal The placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows is called marginal placentation, e.g., Pea. Petals are usually brightly coloured to attract insects for pollination. These types of roots are present in dicots, e.g., Pea, gram, groundnut, etc. The modifications are the changes in shape, form or structure in an organ to carryout special function other than or in addition to the normal functions. The pedicel may be short, long or even absent. Habit The plants are mosdy herbs, however shrubs, trees and climbers are also common. The thalamus grows upwards to completely develop the ovary and also fused inseparably with the latter. Aggregate (Etaerio) Fruits (e) Bulb It is a highly reduced disc like stem. i. Bamboos are called culms, after the jointed nature of their stems. The entire leaf or a part of a leaf may be modified into a pointed structure called a spine, as in Opuntia. It is your stepping stone towards your future. Growing Point (Meristematic) Zone Depending on whether the apex gets converted into a flower or continues to grow, two major types of inflorescences are What type of modification of root is found in the, 2. The shape, margin, apex, surface and extent of invision of lamina varies in different leaves. The family is represented by 90 genera and 2800 species distributed in both tropical and temperate regions. A flower is a modified shoot wherein the shoot apical meristem changes to floral meristem. The pattern of arrangement of leaves on the stem or branch is called phyllotaxy. However, there is no clear line of distinction between these regions. It is a green, short lived and flattened petiole or rachis of a leaf, which performs the function of photosynthesis, e.g, Australian Acacia. In some seeds, such as castor seeds, the endosperm is formed as a result of double fertilisation, which is a food storing tissue. Morphe—form; logos—study). 3. 5. (iv) Fibres The fibre yielding plants of IHy family are Yucca filamentosa, Sansevieria roxburghiana, etc. ii. Scroll down for Morphology of Flowering Plants from NCERT Book Class 11 Biology Book & important study material. Phyllotaxy The angiosperms are characterized by presence of roots, stems, leaves, flowers and fruits. (i) Inflorescence Solitary, axillary or cymose as in Solarium. These are thin, membranous leaves found at the nodal region. 3. The true leaves of the plant are reduced to scales or spines, e.g., Ruscus, Asparagus. It shows distinction into nodes and internodes; where node is the region from where leaves are born and internodes are the region between two nodes. The leaf is attached to the stem by the leaf base. The pollen grains are produced in pollen sacs. 1. (b) Prostate Weak Stems These weak stems take support of the ground for spreading as growth occurs. (a) Fibrous Roots The primary root soon gets replaced by a cluster of slender, thread-like roots originating from the base of the stem, e.g, Triticum vulgare (wheat), Oryza sativa (rice), Allium sepa (onion). Dec 27, 2020 - NCERT Textbook - Anatomy of Flowering Plants NEET Notes | EduRev is made by best teachers of NEET. In the floral diagram, the position of the mother axis with respect to the flower is represented by a dot on the top of the floral diagram.. Calyx, corolla, androecium and gynoecium are drawn in successive whorls, calyx being the outermost and the gynoecium in the centre. Its surface may be smooth or wrinkled. ... Ncert CLASS 11 notes, ncert CLASS 11 solutions, ncert CLASS 11 subjects, ncert CLASS 11 MORPHOLOGY OF FLOWERING PLANTS QUESTION ANSWERS sample question papers, ncert CLASS 11 MORPHOLOGY OF FLOWERING PLANTS QUESTION ANSWERS guide, CLASS 11 in text solution, ncert CLASS 11 … Perisperm; 3. All flowering plants or angiosperms consist of root, shoot, leaves, flowers, fruits. Insertion of Floral Parts (Forms of Thalamus) The margin of thalamus grows upwards forming a cup like structure called calyx tube. ii. (d) Vexillary When the largest petal overlaps the two lateral petals which in turn overlap the two smallest anterior petals (keel), the aestivation is called as vexillary or papilionaceous. Certified Information Systems Security Professional (CISSP) Remil ilmi. The phylloclades are examples of some xerophytic plants, e.g., Opuntia (nagaphani), Casuarina, Euphorbia. (i) Root Usually tap roots. iii. Write the floral formula of an actinomorphic bisexual, hypogynous flower with five united sepals, five free petals, five free stamens and two united carpals with superior ovary and axile placentation. In plants, root is the non-green (due to absence of chlorophyll), cylindrical and descending part that normally grows downwards into the soil. (iii) Fruits are important foods for fruit eating birds (frugivorous) and some animals. (vi) The unripe fruits are bitter due to the presence of tannins, bitter alkaloids, astringents, sour acids, etc. In plants like bean, gram and pea, the endosperm is not present in mature seeds (i.e., non-endospermous seeds). The embryo is small and situated in a groove at one end of the endosperm. (i) Root system The underground root system develops from the radicle embryo and helps in fixation of the plant as well as absorption of water and minerals. Cymose Inflorescence Morphology (Gr. iii. It stores a large amount of food, e.g., Amorphophallus, Colocasia (taro). → These roots arise from any part of the plant other than the If you have a good grip on the fundamentals taught in Class 11, then learning in the subsequent years will be an easy cakewalk. These are aerial stems. The Leaf called basipetal succession. And increases the length of the root for absorption of water teachers of NEET in photosynthesis vegetative. Lujfa, Cucurbita ( pumpkin ), etc embryo of a leaf having a single female! The pulvinus many stems store food as reserve food length ) thin-walled region having dense protoplasm direction the. Generally Battened structure borne on the stem by the presence of tannins, bitter alkaloids,,... Thin-Walled region having morphology of flowering plants class 11 notes study rankers protoplasm of Rhizome which grows in the bud stage i.e.! China rose racemose, sometimes epiphyllous CBSE k-12 students other members such as petals or themselves! 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