Two examples of true spines (modified leaves). 2 views. 4. Give biological reasons for the following statements : In some xerophytes leaves are modified into spines. Part of the leaf modified into tendril in Clematis is Petiole Rachis Petiolules All the above Answer: 4 Q2. Thorns also provide protection to the plant from … In Opuntia , the leaves of areoles are modified into is related to How well do you know about plant leaf?. Cactus is a part of the Succulent family because it has fleshy stems which store water. View All. Know answer of objective question : The leaves are modified into spines in ?. check_circle Expert Answer. because of the spines transpiration occurs less . therefore, it helps desert plant to save water in there body. Thorns are woody, sharp, straight and pointed structures. But for the succulent plants to be called Cactus, they need to have a special structure which is present in the Cactus family. Stipules and Stipular Spines. Text Solution. The spine primordia is produced at the base of the axillary bud's shoot apical meristem; the location where leaf primordia also grows. In such cases the stems become green and carry on photosynthesis. For example in Opuntia minute leaves of axillary buds develop into spines. Xerophytes are plants growing in dry climate. Tendrils and spines are two such structures. Stipular Spines: Stipules can become modified into spiines for defense. The stems of this plant appear like – leaf, termed as- phylloclades which perform the process of photosynthesis. AIPMT 2015: The leaves are modified into spines in (A) Nepenthes (B) Australian Acacia (C) Opuntia (D) Utricularia (E) Tomarix.. The morphological nature of such spines can be pointed out by the presence of a bud in their axis. * See Answer *Response times vary by subject and question complexity. Leaves are modified into spines : Opuntia Stem has sharp thorns : _____ ← Prev Question Next Question → 0 votes . Petiole is modified into tendril in Gloriosa Passiflora Nepenthes Luffa Answer: 3 Q3. It helps if you think of cactus as a large stem with leaves (spines). Leaf MCQ (Multiple Choice Questions and Answers) Q1. Check Answer and Solu Succulent leaves not only retain lots of moisture but also have a lower surface to volume ratio. Give biological reasons for the following statements : In some xerophytes leaves are modified into spines - Biology. Leaves become modified into spines in :- 600+ LIKES. Know answer of objective question : The leaves are modified into spines in?. hiipranav hiipranav Answer: Because of the low concentration of water and moisture in that environment. Though cactus spines are modified leaves, they do not contain any of the cells or tissues characteristics of leaves when they mature. winter. This modification helps the plant to cut down transpiration and also protects the plants against the attacks of grazing animals. Spines: Leaves are modified into spines to reduce water loss, like cactus. 0 votes . Bud scales form before the onset of unfavorable growing seasons i.e. Question 18. In prickly poppy, leaves bear spines on the margin. Give a biological reason why in some xerophytes ,leaves are modified into spines. In Opuntia, the leaves of areoles are modified into Spines Glochidia Scales Tendrils Answer: 1 Q4. Spines are sharp, pointed structures which are modified leaves. They can be branched or simple. The leaf parts become modified into spines in order to protect the plants from grazing animals and excessive transpiration. Any part of the leaf may get modified in to spine. 300+ VIEWS. In cactus spines are found in groups which is called as areole. Thank you for A2A. These spines help in storing water in the steams by reducing the amount of transpiration. Thorns. This process is called transpiration. Leaf-Spines: In Hakea and Opuntia the whole leaves are modified into spines. Leaves release water from the stomata to cool the plant. Besides, they also provide protection to the plant from grazing animals. Leaves become modified into spines in :- Options (a) Pea (b) Onion (c) Silk Cotton (d) Opuntia. Like sharp-pointed daggers, they are a hazard when climbing into date palms to pick the fruit. Cacti are xerophytes which have to survive in dry conditions. Homology: Leave It To the Plants. 200+ LIKES. Loss of water from the leaves tend the roots to pull more water from the ground. In Acacia nilotica and Zizyphus the stipules are modified into spines. Answered - [Opuntias] [Australian Acacia] [Nepenthes] [Utricularia] are the options of mcq question The leaves are modified into spines in realted topics , NEET topics with 0 Attempts, 0 % Average Score, 1 Topic Tagged and 0 People Bookmarked this question which was asked on Nov 16, 2018 19:12 Correct Answer: Opuntia. Note the sharp spines on the cactus above. ADVERTISEMENT. No, the cactus performs this through stems as the leaves are modified into spines. Explain its use to the plant. These questions will build your knowledge and your own create quiz will build yours and others people knowledge. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes! Pea Onion Silk Cotton Opuntia Answer : D Related Video. Most cactus morphologists have concluded that cactus spines are either modified leaves or modified bud scales (the difference is inconsequential because bud scales themselves are modified leaves). Assertion :- In some xerophytic plants stem becomes green , flat,leaf like and leaves are modified into spines . In the following photos of plants, the leaves are quite different from the "normal" leaves we envision. Leaves are modified into spines in Opuntia (xerophytes) so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration. Other articles where Spine is discussed: angiosperm: Leaf modifications: Spines are also modified leaves. Want to see this answer and more? Cactus spines are also known as modified bud scales, which also are modified leaves. Why are the leaves of cactus plants modified into... morphology-of-flowering-plants. Link to raw image collection of modified leaves. Left: A simple leaf in which the blade is not divided into leaflets. answer comment .. 1 Answer. Want to see the step-by-step answer? What is a tendril ? Leaves become modified into spines in 2:29 2.4k LIKES. Register; Test; Home; Q&A; Unanswered; Categories; Ask a Question; Learn; Ask a Question. Answer this multiple choice objective question and get explanation and result.It is provided by OnlineTyari in English Answer this multiple choice objective question and get explanation and result.It is provided by OnlineTyari in English ShelchavCactus spines are actually modified leaves. 500+ VIEWS . Here you can create your own quiz and questions like In Opuntia , the leaves of areoles are modified into also and share with your friends. Solution: The spines present on Opuntia represent the reduced leaves. Leaf-spines : In this type the leaves become wholly or partially modified into sharp pointed structures known as spines. The cactus plant grows in a desert where there is a shortage of water. Angiosperm - Angiosperm - Leaf modifications: Whole leaves or parts of leaves are often modified for special functions, such as for climbing and substrate attachment, storage, protection against predation or climatic conditions, or trapping and digesting insect prey. Remember. Each leaf has a very different shape and function, yet all are homologous structures, derived from a common ancestral form.The pitcher plant and Venus' flytrap use leaves to trap and digest insects. For example in They give protection to the plants from herbivores. Different part of a leaf or entire leaf may be modified in to spines. They give protection to the plants from herbivores. Spines-leaves modified for protection. ask related question comment. Here's your answer.. _____ Cacti have spines instead of leaves. Modified branches or stem are known as thorns. Leaves of cactus plants are modified into spines to reduce loss of water through transpiration. e.g., In Opuntia leaves of axillary branches are modified into spines. Explanation: In Opuntia, leaves become modified into spines to avoid transpiration so as to save water for desert adaptation. 300+ SHARES. Check out a sample Q&A here. In desert plants,the leaves are modified into spines 2 See answers Geetu18 Geetu18 Answer: spines are hard so, it is not easy to loose water through spines. In pea, the leaves are modified into tendrils to help them in climbing around support, in onion leaves are modified to fleshy succulent to store food. The leaves in a cactus plant are modified into spines to prevent the loss of water. Modified Leaves. The basal leaf segments (pinnae) are modified into stiff pines. In cacti, spines are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and drip condensed water vapour during the cooler night. 500+ SHARES. Leaves are modified into spines, as the normal leaves transpire more water. Median response … Succulence: In a dry environment, leaves may either become reduced, like in cacti, or, else, become succulent. CONTINUE READING BELOW. Numerous plants have spines of course, but in cacti, spines occur in clusters in the axil of leaves, even though the leaves are usually microscopic. Zizyphus . See Answer.
Reason :-In xerophytic areas rate of transpiration is high , so plants develop various adaptions to minimize transpiration. Leaves are modified into spines : Opuntia Stem has sharp thorns : _____ Login. Click here to get an answer to your question ️ why are the leaves of cactus modified into spines kushal9567 kushal9567 10.03.2018 Science Primary School Why are the leaves of cactus modified into spines 2 See answers Brainly User Brainly User Hey mate..! The key difference between tendrils and spine is that tendrils are slender, coiling plant parts which are often modified leaves, leaf parts or stems while spine is a modified leaf, stipule or a part of leave that has a pointed end.. Plants have different types of structures in addition to leaves, stems and roots. The leaves are modified into the spines which can be observed on the stems. Bud Scales-are tough, overlapping, waterproof leaves that protect buds from frost, desiccation, and pathogens. answered by Afreen Ibrahim. Scale leaves: In some plants, like onion and ginger, thin and dry or thick and fleshy scale leaves are present.Their function is to protect buds. e.g. (ii) Spines : A pointed structure formed by the modification of entire leaf or part of a leaf is called a spine. asked in Morphology of Flowering Plants by Lifeeasy Biology. In the many species of the spurge family… Solution Show Solution. Spines of cactus plants are modified leaves or shoots located in the axil of a leaf. It is important for them to conserve water. To reduce loss of water through transpiration leaves of cactus plants are modified into spines. Question By default show hide Solutions. Midrib modified into tendril, e.g., Nepenthes. They have variou adaptations to cut down transpiration:- 1. 4 Q2 reduce water loss, like in Cacti, or, else become! Spines in 2:29 2.4k LIKES photos of plants, the leaves are modified into spines:., in Opuntia leaves of axillary buds develop into spines, as the leaves of cactus as large! 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