It is shorter and thicker and is found in aquatic plants. The time of birth to common death of a living being is called Life Traverse. Wild strawberry is an example of . Each stamen represents the male reproductive organ. Free PDF download of Important Questions with Answers for CBSE Class 11 Biology Chapter 5 - Morphology of Flowering Plants prepared by expert Biology teachers from latest edition of CBSE(NCERT) books. Mentha sp.(mint). These are fleshy, green, and take part in photosynthesis. These are leaves modified into scales or spines to check transpiration. For example, Sweet potato and Dahlia. What is the significance of transpiration? It grows horizontally for a distance under the soil and then emerges obliquely upwards. Runner is a fast growing stem that grows on the surface of the soil.They develop into a new plant. They detach to become new plants. These are largely used as food and grow very slowly. In horticulture, branches are lowered down to meet the soil where they strike the root. Spadix is a special type of spike having a fleshy peduncle and a large brightly coloured bract called spathe. Adventitious roots are usually absent e.g., Potato. It contains objective, very short answer type, short answer type, and long answer type questions. The corm has distinct circular nodes and in ternodes. They undergo vegetative propagation to form a new plant. Example: Guava, Cucumber, Sunflower. Prickles are superficial outgrowths on the plant. This modification is seen in xerophytic plants and stores water. The number of ends in a glycogen molecule would be (a) equal to the number of branches plus one (b) equal to the number of branch points (c) one (d) two, one on the left side and another on the right side. These are fleshy, green flattened or cylindrical branches of unlimited growth. It is fleshy, non-green underground stem. Underground modifications of Stem II. In certain plants, the aerial stem or buds get modified to perform special functions like climbing, protection, food storage, vegetative propagation etc. NEET Biology Chapter Wise Mock Test – Morphology of Flowering Plants 1. In this, the bulbils are condensed auxiliary buds. It is a highly condensed discoid stem its upper surface a terminal bud and many fleshy scale leaves are present. We have provided Reproduction in Organisms Class 12 Biology MCQs Questions with Answers to help students understand the concept very well. Our mission is to provide an online platform to help students to share notes in Biology. The nodes bear axillary buds, scale leaves and adventitious roots. Thorns are used as organs of defence or climbing (e.g. Opposite decussate phyllotaxy is found in: a) Calotropis b) Mango c) Hibiscus d) Nerium 37. Suckers are the short underground stem branches that arise from the base of an aerial stem.These branches can grow aerially and develop adventitious roots and new suckers at their bases. Your email address will not be published. They produce aerial shoots annually. Each eye represents a node, bearing one or more buds subtended by a leaf scar (= scale leaf).  Many fleshy scale leaves are present. A tunicated bulb is covered by a sheath of dry membranous scale leaves called tunic, e.g., onion and garlic. The exemplar has been provided by the National Council of Educational Research & Training (NCERT) and the candidates can check it from below for free of cost. A sheath of dry membranous scale leaves covers the tunicated bulb. Stolon: It's a weak lateral stem that rises from the main stem base. An underground runner is called sobole, e.g. Vegetative propagation occurs through stems when new plants arise from the nodes. 35. Check the below NCERT MCQ Questions for Class 12 Biology Chapter 1 Reproduction in Organisms with Answers Pdf free download. Vegetative Propagation by Stems. What is its function? It is a short runner with one internode long. NCERT Solutions for Class 12 Maths. Stolon, offset and rhizome are different forms of stem modifications. Stolon is a modification of stem which is also known as runner. 3. How 18-04-2018. Example: Onion (Allium cepa), Garlic (Allium sativum) etc. Example – Pistia, Eichhornia. Runners arise from the auxiliary buds. Rearrange the following zones as seen in the root in vertical section and choose the correct option. NCERT solutions for class 11 biology chapter 5 morphology of flowering plants: This chapter will tell you that flowering plants exhibit enormous variation in shape, size, structure, mode of nutrition, life span, habit, and habitat and they have well-developed root and shoot systems. E.g., Jasmine. These sprouts can be separated from the parent plant and when planted in other areas, new plants are formed. (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments, The best answers are voted up and rise to the top. Spines are the modified plant organs. Click here to view, download or print flexiprep exclusive NCERT Class 11- Biology: Chapter –5 Morphology of Flowering Plants Part 6. Subaerial modifications of Stem III. NCERT Solutions. Disclaimer Copyright, Share Your Knowledge Stolon is present in the internodal region, it is aerial, forms an arch and touches the substratum forming nodal region. An aphid, giving birth to a live young by parthenogenesis is shown in … In case of garlic, the bulb consists of an aggregate of bulblets or cloves, each covered by its individual tunic. Learn more about the types, advantages and disadvantages of asexual reproduction only at CoolGyan. Why do lymph nodes often swell and become tender or even painful when you are sick? Thus we see how the stem is modified according to the functions it performs. Many plants produce underground stems for perennation and food storage. The various aerial modifications are as follows: Stem or its branches get modified into green thread like leafless structures called tendrils which are meant for climbing. E.g., Dioscorea. Detachment of entire branch or a node can develop into a new plant. The leaves are modified into spines or scales to check transpiration. Stem tuber is a swollen tip of an underground lateral Stem (Stolon). NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. 56. In Citrus, Duranta and Aegel thorns are modified axillary buds; in Carrissa (Or. What is a mushroom shaped gland? They help in photosynthesis. Taproot, the main root of a primary root system, growing vertically downward. It does not contain adventitious roots. A cluster of adventitious roots arise from the base of the bulb. MCQ Questions for Class 12 Biology with Answers were prepared based on the latest exam pattern. It has distinct nodes and internodes. This can be done artificially as well, which is widely employed in horticulture. It moves horizontally under the soil for a distance and then grows obliquely upwards. These are modified into: It is a creeper that runs horizontally on the surface of the soil. Dear student . Runners break off and grow into an independent plant giving rise to vegetative propagation. After growing aerially for a while it bends downwards to touch the ground. In other plants, the initial taproot of the seedling is replaced by a fibrous, or diffuse, root system. MORPHOLOGY OF FLOWERING PLANTS 2525252525 in shallow water or in marsh lands. Agropyron. This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. ‘Potato is a stem and sweet potato is a root.’ ... (stolon). E.g. Stolons are produced by virtually all June-bearing strawberry plants and most everbearing and day-neutral strawberry varieties. Mint plant reproduces both vegetatively and through seeds. It is modified into three important types: Some underground stems are modified for food storage and to survive under unfavourable conditions. After growing aerially for some time it bends downwards to touch the ground, where its terminal bud gives rise to a new shoot and adventitious roots. Offset: This is a short runner with one lone internode. The rhizome rootstock grows vertically upwards instead of horizontal. What part of the plant is modified into a ‘pitcher’? A scaley bulb contains no tunic. Terminal buds also present. Example: Palm, Colocasia. Rhizomes . A large number of runners are produced by a mother runner in all the directions. 18. Silene exhibits clear nodes and internodes. The stems are modified into aerial forms to perform important functions such as climbing, food storage, vegetative propagation, and protection. It consists of fleshy internodes and the leaves are modified into spines or small scaly leaves. ... NCERT. Give one example of each. 4. 4. For example, despite the presence of a green leaf and optimal light and CO 2 conditions, the plant may not photosynthesise if the temperature is very low. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? Aerial modifications of Stem. There are auxiliary as well as apical buds. Content Guidelines 2. 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