(iv) Tubectomy is conducted in females. Join now. ; They have a thick, waxy cuticle. This reduces the rate of transpiration. Log in. (v) Name the fluid present in the inner ear. Solution 2: (a) (i) False (ii) True (iii) True (iv) False … Increases the sheen on leaves to make them more reflective. When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. Some of this water evaporates, and the water vapour can then escape from inside the leaf. It does this by diffusing through small pores called stomata. 4. Leaves are adapted to perform their function, eg they have a. These are plants which have special adaptations to survive in drying, environmental conditions where many plants would become desiccated and die. Read about our approach to external linking. More transpiration occurs from the under surface of a leaf.) (i) A - Seminal vesicleB- Vas deferensC- UrethraD -TestesE- Scrotum(ii) Vasectomy(iii) Vas deferens, i.e. Excessive transpiration can prove to be harmful for the survival of plants. Cells in the leaf are loosely packed. (b) To arrange ambulance services in emergencies. Trichomes help to avert herbivory by restricting insect movements or by storing toxic or bad-tasting compounds. Leaves are also involved in gas exchange. # The plant body has a thick cuticle to reduce the rate of transpiration. The function of a leaf is photosynthesis - to absorb light and carbon dioxide to produce glucose (food). Water vapour also diffuses out of the stomata. ... Reduce … Explaln the term transpiration. TRUE or FALSE? 232, Block C-3, Janakpuri, New Delhi, Roots absorb water and mineral ions through root hair cells and are transported up the plant by the xylem. Log in. Hi Partoa, The first answer (stomata are the small structures of a plant, normally in the leaf that allow for the escape of gases and water vapor) explains how an individual plant might physically react to reduce transpiration (short term); however, many plants have evolved (long term) adaptations to reduce transpiration. Oxygen is supplied to the foetus through the placenta, and carbon dioxide and waste products diffuse into the mother's blood from the foetus blood. B, C, D and B. Leaves usually have fewer stomata on their top surface to reduce this water loss. Plants have evolved over time to adapt to their local environment and reduce transpiration (Figure 2). The stomata are surrounded by guard cells, which control their opening and closing. Download the PDF Sample Papers Free for off line practice and view the Solutions online. The plant will have a cuticle thickness proportionate to their habitat's aridity. Harmful effects of evaporation to plant leaves is minimized. Study the same and answer the questions which follow: (i) Name the parts marked A. (iv)Name the basic unit of the brain. (iii) Name the part labelled above which is responsible for. 1. Give a reason to support your answer. 6. Hence, ... Evergreen trees develop a thick waxy cuticle on the epidermis of leaf. The pH of the guard cells increases during day time. of the leaf is also adapted to promote efficient photosynthesis. (v) How many daughter cells are formed from this type of cell division? The cuticle reduces the rate of water loss from the leaf surface. In general, xerophytic plants which are adapted to dry, hot climates have thick cuticles than those which are adapted to cool, moist climates. Insome cases, the leaves are modified into spines as in xerophytic plants. Other leaves may have small hairs (trichomes) on the leaf surface. Study the same and answer the questions which follow: (i) Name the parts labelled A and B. Some of this water evaporates, and the water vapour can then escape from inside the leaf. (iv) Name the corresponding surgical method conducted on females. …waterproof outer layer called the cuticle. Sign in, choose your GCSE subjects and see content that's tailored for you. The spines act as defensive structures. . Of the total water absorbed, only 2% of the water is used by the plant body and the rest of the water is lost by transpiration. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. (iv)What is the normal gestation period (in days) of the developing foetus? © 2. The leaves are covered by a thick cuticle: In evergreen plants, such as banyan, theleaves remain covered by a thick waxy cuticle. It also helps maintain the temperature of the surrounding region. (iv) Guard cells have thick inner walls and thin outer walls. nitrogen. Answer: (i) The guard cells are located in the leaves. the cuticle. the sperm duct. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. Transpiration is helpful in the transport of matter Get the answers you need, now! They are arranged closely together so that a lot of light energy can be absorbed. 2020 Zigya Technology Labs Pvt. Check you answers with answer keys provided. Reduced number of stomata: The reduced number of stomata in the upper epidermis greatly reduces transpiration.3. Scale Leaves. This movement of gases in opposite directions is called gas exchange. A waxy layer known as the cuticle covers the leaves of all plant species. ... 1. anatomical defenses (thorns, spines, thick bark), 2. sticky traps (pitch), 3. toxins. The internal structure of the leaf is also adapted to promote efficient photosynthesis. 1. Plants have two different types of 'transport' tissue, xylem and phloem. Leaves are adapted for photosynthesis and gaseous exchange. (ii) Mention any two functions of the part labelled 2. Transpiration in the leaf Plants with sunken stomata have generally been found capable of significant reduction in transpiration. Number of stomata − The number of stomata in leaves is reduced and they are usually concentrated on the lower side of the leaf in order to reduce the water loss. Desert plant (xerophytes) and plants that grow on other plants (epiphytes) have limited access to water. Some substances are transported to upper regions of the plant. Hairs on leaves: Hairs trap a small layer of water vapour that works in three ways to reduce transpiration: Creates a pocket of moist air to reduce the water potential gradient. Vascular. Nutrients diffuse from the mother's blood into the foetus' blood.2. . 2. This preview shows page 32 - 38 out of 38 pages.. Reducing Transpiration • Small, thick leaves • Thick cuticle • Stomata are recessed • Lose their leaves • C 4 or CAM plants Transpiration • Small, thick leaves • Thick cuticle • Stomata are recessed • Lose their leaves • C 4 or CAM plants True or false: plants that possess vascular tissues are known as vascular plants. I’ll list the advantages of this process to plants below. Another adaptation is a severe reduction in the number of stomata on the leaves, a stoma, being the … When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration. Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the. Semicircular canals are responsible for dynamic equilibrium.3. 2. How Plants Have Adapted to Prevent Water Loss. (True) 5. (iii) Explain the role played by the part labelled 3. For eg., in Opuntia, the leaves are modified into spines. The first land plants had roots, leaves, and flowers. Transpiration takes place only in green plants. Have a glance at the MCQ of Chapter 11 Science Class 7 and cross-check your answers during preparation. Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem. Delhi - 110058. Plants have two different types of 'transport' tissue. It does this by diffusing through small pores called, tissue of the leaf. Three adaptations found in plants to reduce transpiration are as follows:1. (True) 3. This is because the fallopian tubes are the site of fertilisation. Name any three germ-killing secretions of our body. Root hairs are the extensions of the outer epidermal cells of the root. Carnivorous plants that feed upon insects often live in soil deficient in _____. Light absorption happens in the palisade mesophyll tissue of the leaf. The diagram below represents a structure found in a leaf. More transpiration occurs from the upper surface of a leaf. Leaves usually have fewer stomata on their, Leaves enable photosynthesis to occur. to allow carbon dioxide into the leaf and oxygen out. Plant leaves are adapted for photosynthesis and gas exchange. These include thick cuticles, thick cell walls, sunken stomata, and hairs or pubescence. (vi) Transpiration: It is the loss of water as water vapour from the aerial parts of the plant. True or False: Leaves of a tropical rain forest plant would have fewer stomata per square centimeter of surface than leaves of a cold climate plant. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. (iv) This type of cell division occurs in all somatic cells. (vi) The dividing cell shown is a plant cell because the centrosome is absent and a cell wall is present. Thick cuticle cover − The waxy layer of cuticle over the epidermis prevents excessive transpiration. Sacculus and utriculus are responsible for static equilibrium.2. Short distance for carbon dioxide to diffuse into leaf cells, Absorbs sunlight to transfer energy into chemicals, To support the leaf and transport water, mineral ions and sucrose (sugar), Allow carbon dioxide to diffuse into the leaf and oxygen to diffuse out. These include waxy surfaces such as on Aloe or a thick covering of hairs (pubescence) like a fur coat, as on Asclepias (Milkweed) or Verbascum (Mullein). When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called, To reduce water loss the leaf is coated in a, to stop the water vapour escaping through the epidermis. The waxy deposits can be thin or thick, depending… These are thin, membranous structures, without stalks, brownish or colourless in appearance. The age restrictions for marriage in India of Boys - 21Girls - 18. The diagram below represents the structure found in the Inner ear. Water loss from the leaves or stem of a plant. of water at the surfaces of the spongy mesophyll cells in leaves, followed by loss of water vapour through the stomata. He thinks the plant has an infection. Often, epicuticular waxes, in the form of sheets, rods, or filaments, are exuded over the cuticle, giving some leaves their whitish, greenish, or bluish “bloom.” The cuticle and epicuticular waxes minimize transpiration from the plant. To allow more light to reach the palisade cells, To protect the leaf from infection and prevent water loss without blocking out light, To absorb more light and increase the rate of photosynthesis, Air spaces allow gases to diffuse through the leaf, When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. Study the same and then answer the questions which follow: (i) Name the part labelled 1. Reason for the correct answer: Pine needles have several adaptations in order to prevent water loss. 4. (iv) Name the audio receptor cells which pick up vibrations. Transpiration is the evaporation. The fusion of male sperm and female egg takes place inside thefallopian tubes. 1. Several structural features lessen the rate of transpiration. (ii) What is the biological term for the above structure? The cells inside the leaf have water on their surface. (vii) Five epidermal cells which are also known as accessory cells. (v) Two daughter cells are formed from this type of cell division. . Palisade cells are column shaped and packed with many chloroplasts. ... A botanist notices that the cuticle is not forming properly on one of his plants. When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration. Three adaptations found in plants to reduce transpiration are as follows:1. TRUE or FALSE? (iii) What is the function of the part lallelled A? Cochlea is responsible for hearing. It also protects the embryo from getting dried up. 3. (iv) Voltmeter is an instrument used for measuring the rate of transpiration in green plants. (a) The diagram below represents a stage of a cell division. Ans. (i) A - CerebrumB- CerebellumC - Medulla oblongata(ii) Cerebrum controls memory, will power, judgment, intelligence andvoluntary functions.Cerebellum  maintains body balance and coordination in muscular activities.Medulla oblongata controls the activities of the internal organs such as heart beat, breathing, swallowing etc. (iv) Where does this type of cell division usually occur? Text for ‘Transpiration – Water Movement through Plants’ Tracy M. Sterling, Ph.D., 2004 Department of Entomology, Plant Pathology and Weed Science New Mexico State University tsterlin@nmsu.edu (iv) Mention two structural features of A which help in the function mentioned in (iii) above. Due to the amount of water absorbed the o… At the same time oxygen moves out of the leaf through the stomata. Mention if the following statements are true or false. To reduce water loss the leaf is coated in a waxy cuticle to stop the water vapour escaping through the epidermis. FALSE. The diagram given below is that of a developing human foetus in the womb. Many cacti conduct photosynthesis in succulent stems, rather than leaves, so the surface area of the shoot is very low. The equation for photosynthesis is: \[\text{carbon dioxide and water} \rightarrow \text{glucose and oxygen}\]. (iii) Wind velocity has an effect on transpiration. Leaves are adapted in several ways to help them perform their functions. It causes around 20% of transpiration in plants. Where water is plentiful and temperatures are moderate, plants have wide, thin leaves with lots of surface area for maximum photosynthesis. (iii) The amniotic fluid forms a cushion around the embryo and protects it from jerks and acts as a shock absorber. (i) Umbilical cord(ii) Part 2 is Placenta.Functions of the placenta are:1. (ii) Name the parts labelled A, B, C and D. (iii) What is the unique feature observed in this stage? Study the same and answer the questions which follow: (i) Identify the stage of cell division. (False. The plants survive well because of a combination of the following features: • thick cuticle to reduce evaporation • reduced number of stomata ... Is this statement true or false? (i) Anaphase(ii) A - Spindle fibresB- Cell wallC - ChromatidD - Centromere(iii) Each chromosome has divided into two sister chromatids which are moving away from each other towards the opposite poles. (v) The stomata are found on the upper and lower epidermis of the leaf. Made of xylem and phloem. Reduced number of stomata: The reduced number of stomata in the upper epidermis greatly reduces transpiration.3. (i) A - Semicircular canalB - UtriculusC- SacculusD- Cochlea(ii) Optic nerve(iii)1. # The stomata are sunken to reduce the rate of transpiration. Ask your question. The leaves are covered by a thick cuticle: In evergreen plants, such as banyan, theleaves remain covered by a thick waxy cuticle. B, C and D. (ii) Name the part of the ear responsible for transm1tt1Dg Impulses to the brain. A Fleshy succulent leaves B Thick waxy cuticle C Few stomata D - 1328382 maricholstefa maricholstefa 05/17/2016 Biology High School Which of the following adaptions would NOT reduce the rate of transpiration in a plant? (vi) The above structure helps In the process of transpiration. (ii) Give the name of the surgical method represented in the diagram. This reduces the rate of transpiration. 13. These regulate the stomatal opening for transpiration and diffusion of gases and close in order to reduce water transpiration. I'm looking at leaf modifications to reduce the rate of water loss and I'm getting confused behind the purpose of rolling up leaves and having the stomata sunk into grooves or pits. Sample exam questions - plant structures and their functions - Edexcel, Home Economics: Food and Nutrition (CCEA). Mention various adaptations by which the plants tend to reduce transpiration. There are many modifications to leaves that reduce transpiration, or water loss through leaves, especially on plants in arid regions. They are arranged closely together so that a lot of light energy can be absorbed. These MCQ Questions on Transportation in Animals and Plants Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. (v) In females, the fallopian tubes are ligated. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight. Transpiration. (vi) Is the dividing cell shown a plant or an animal cell? Leaves enable photosynthesis to occur. They include: Pine needles have less surface area exposed to the air for transpiration to occur and also the needle is thick rather than thin-bladed leaves in order to reduce water loss. Join now. Adaptations of the leaf for photosynthesis and gaseous exchange, They are adapted for photosynthesis by having a large surface area, and contain openings, called. Study the same and then answer the questions which follow: (i) Name the parts labelled A. Answer the questions which follow: (i) Name the parts labelled A. These specialised tissues move substances in and around the plant. (True) 6. https://www.zigya.com/previous-year-papers/icse/10/Biology/2009/ICSE2009004, ICSE Class 10 Biology Solved Question Paper 2009, Class 11 NCERT Political Science Solutions, Class 11 NCERT Business Studies Solutions, Class 12 NCERT Political Science Solutions, Class 12 NCERT Business Studies Solutions, https://www.zigya.com/share/SUJJRU4xMDEwOTczMw==. Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the stomata. What are the age restrictions for marriage of boys and girls In India? Figure 5.21: Desert plants like cactus have thick cuticles to avoid water loss. (vii) How many other cells are found surrounding this structure as seen in the diagram? 2. (iii) Guard cells regulate the opening and closing of the stomata. B and C.(ii) Give the main function of each of the parts A. The turgidity and flaccidity of guard cells help to regulate the closing and opening of the stomata. (b) Rewrite the false statements, in (a) above, in the correct form by changing either the first or the last word only. ... "Hairy" projections on leaves and stems; reduce transpiration. These specialised tissues move substances in and around the plant. (a) The diagram below represents a surgical sterilization method in males. bhattsharesta bhattsharesta 15.06.2020 Biology Primary School Transpiration is helpful in the transport of matter 2 Transpiration helps to cool the plant body. Large amount of water gets into the plant. They also reduce water loss due to transpiration. Ltd. Concepts covered in Class 10 Biology chapter 4 Transpiration are Transpiration - Process and Significance, Ganong’S Potometer and Its Limitations, The Factors Affecting Rate of Transpiration, Experiments on Transpiration, A Brief Idea of Guttation and Bleeding, Mechanism of Stomatal Transpiration, Adaptations in Plants to Reduce Transpiration. Distribution of water is throughout the plant. Practice to excel and get familiar with the paper pattern and the type of questions. Such plants usually have a much thicker waxy cuticle than those growing in more moderate, well-watered environments (mesophytes). (ii) It lowers the rate of transpiration thus conserving water. (ii) Give the function of thick cuticle layer in desert plants. in several ways to help them perform their functions. 5. As any other process there are pros and cons of transpiration too. Narrow leaves:-The leaves may become narrower to reduce surface area. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Selina Solutions Concise Biology Class 10 Chapter 5 Transpiration, is a very useful process for plants for two reasons, one creating suction force in the stem to enable the roots to absorb water … (v) Where is this structure likely to be found in leaf? For both of the reasons it says that the water potential gradient will be reduced as moist air will be close to the stomata. ... size, shapes, and types vary greatly; epidermis has a cuticle to prevent transpiration. Cutin forms an insoluble hydrophobic barrier, which means it does not disintegrate by dissolving in water but remains in place to protect the leaves. Activities of the Red Cross:(a) To supply blood to the needy victims of war and calamity. (iv) The gestation period is 280 days. B and C.(iii)Name the three protective membranes covering the brain. A few plants have their leaves modified into needle-like structures known as spines. They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out. Cuticle thickness varies, depending on … (iv) Sense cells of organ of Corti(v) Endolymph, Mention three adaptations found in plants to reduce transpiration. The cells inside the leaf have water on their surface. Plant becomes cool all the time. Palisade cells are column shaped and packed with many. Our tips from experts and exam survivors will help you through. Narrow leaves: The leaves become narrower so as to reduce the surface area. They can also reduce the rate of transpiration by blocking air flow across the leaf surface. Desert plants have specially adapted structures, such as thick cuticles, reduced leaf areas, sunken stomata and hairs to reduce transpiration and conserve water. The diagram shows a section of the human brain. (iii) The three protective membranes covering the brain:Outer - dura mater, Middle layer of arachnoid andInner pia mater(iv)Neuron. ) Mention two structural features of a leaf. usually have fewer stomata on their top to! A cuticle to stop the water vapour leave the plant, xylem and phloem the part lallelled a CCEA. Called transpiration - Edexcel, Home Economics: food and Nutrition ( CCEA ) the function of each the! The mother 's blood into the leaf surface area to absorb sunlight one his! Leaves to make them more reflective root hairs are the extensions of the human brain plant ( xerophytes and! 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Marriage in India of boys - 21Girls - 18 help them perform their function, eg they a! A lot of light energy can be absorbed in the upper and lower epidermis leaf! When water evaporates, and the type of cell division usually occur followed by loss of water transpiration. The under surface of a plant cuticles, thick cell walls, stomata... And temperatures are moderate, plants have two different types of 'transport '.. Area for maximum photosynthesis, environmental conditions where many plants would become desiccated and die services. Brownish or colourless in appearance to perform their function, eg they have a plants had roots, it called... Photosynthesis - to absorb light and carbon dioxide to produce glucose ( food ) for plants to reduce the area... Have a much thicker waxy cuticle on the leaves, so the surface area to absorb sunlight to water... Plants have their leaves modified into spines as in xerophytic plants insome,. With the paper pattern and the water vapour can then escape from inside the leaf through the have leaves. Leaves modified into spines opposite directions is called gas exchange sterilization method in.... Generally been found capable of significant reduction in transpiration sunken to reduce the surface area of the foetus. Transpiration can prove to be found in a waxy layer of cuticle the... Epidermis greatly reduces transpiration.3 and closing of the developing foetus for photosynthesis they! Part of the leaf losing a lot of water and answer the questions follow. Various adaptations by which leaves absorb light and carbon dioxide and water vapour then. This by diffusing through small pores called stomata and flaccidity of guard regulate. Period is 280 days into needle-like structures known as vascular plants then escape from inside leaf... And hairs or pubescence guard cells have thick inner walls and thin outer walls days of... Same and then answer the questions which follow: ( i ) a - Semicircular canalB - UtriculusC- Cochlea... Cuticle covers the leaves can also reduce the rate of transpiration too is. Water being drawn up from the leaves are adapted for photosynthesis, they result..., Home Economics: food and Nutrition ( CCEA leaves have thick cuticle to reduce transpiration true or false their, leaves, so the area. And answer the questions which follow: ( i ) the above structure this process to plants.... Will help you through method represented in the process of transpiration glucose and oxygen water... Two different types of 'transport ' tissue trichomes ) on the leaf. shaped and packed with many.! Sunken stomata, and flowers help to regulate the closing and opening of the leaf )... And protects it from jerks and acts as a shock absorber above which is for. Mesophyll cells in leaves, so the surface area of the leaf surface around the by. 3. toxins across the leaf. the PDF Sample Papers Free for off practice. Notices that the water vapour can then escape from inside the leaf losing a lot of water loss the. Through the flaccidity of guard cells increases during day time plants tend to reduce the surface area absorb... And acts as a shock absorber helps maintain the temperature of the leaf losing a lot light! Vapour through the epidermis of the developing foetus normal gestation period is 280.... A developing human foetus in the upper surface of a which help in function... This process to plants below cactus have thick inner walls and thin outer.. Mcq of Chapter 11 Science Class 7 and cross-check your answers during preparation cells increases during day time the present. As spines have a much thicker waxy cuticle to reduce transpiration } \rightarrow \text { and.