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## leaves have thick cuticle to reduce transpiration true or false

Transpiration is the evaporation. These include thick cuticles, thick cell walls, sunken stomata, and hairs or pubescence. . More transpiration occurs from the under surface of a leaf.) (a) The diagram below represents a surgical sterilization method in males. This movement of gases in opposite directions is called gas exchange. 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. 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. A few plants have their leaves modified into needle-like structures known as spines. Desert plants have specially adapted structures, such as thick cuticles, reduced leaf areas, sunken stomata and hairs to reduce transpiration and conserve water. (a) The diagram below represents a stage of a cell division. Palisade cells are column shaped and packed with many. Practice to excel and get familiar with the paper pattern and the type of questions. nitrogen. (vi) The above structure helps In the process of transpiration. They are arranged closely together so that a lot of light energy can be absorbed. True or false: plants that possess vascular tissues are known as vascular plants. 2. Study the same and answer the questions which follow: (i) Name the parts marked A. Increases the sheen on leaves to make them more reflective. Nutrients diffuse from the mother's blood into the foetus' blood.2. 2. 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. These specialised tissues move substances in and around the plant. Plants have two different types of 'transport' tissue. More transpiration occurs from the upper surface of a leaf. Excessive transpiration can prove to be harmful for the survival of plants. of the leaf is also adapted to promote efficient photosynthesis. 2. (iii) What is the function of the part lallelled A? Leaves are adapted to perform their function, eg they have a. Cochlea is responsible for hearing. Another adaptation is a severe reduction in the number of stomata on the leaves, a stoma, being the … Give a reason to support your answer. The internal structure of the leaf is also adapted to promote efficient photosynthesis. © # The stomata are sunken to reduce the rate of transpiration. Leaves are also involved in gas exchange. (iv) Where does this type of cell division usually occur? Cutin forms an insoluble hydrophobic barrier, which means it does not disintegrate by dissolving in water but remains in place to protect the leaves. Plants with sunken stomata have generally been found capable of significant reduction in transpiration. 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). FALSE. TRUE or FALSE? I’ll list the advantages of this process to plants below. Reduced number of stomata: The reduced number of stomata in the upper epidermis greatly reduces transpiration.3. 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. (ii) What is the biological term for the above structure? (iv)What is the normal gestation period (in days) of the developing foetus? (v) Name the fluid present in the inner ear. Ltd. Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the stomata. When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. How Plants Have Adapted to Prevent Water Loss. 4. The diagram below represents a structure found in a leaf. Water vapour also diffuses out of the stomata. 6. (iv) This type of cell division occurs in all somatic cells. It does this by diffusing through small pores called stomata. (iv) Name the corresponding surgical method conducted on females. Due to the amount of water absorbed the o… Desert plant (xerophytes) and plants that grow on other plants (epiphytes) have limited access to water. ... Reduce … Study the same and answer the questions which follow: (i) Identify the stage of cell division. This reduces the rate of transpiration. Study the same and then answer the questions which follow: (i) Name the part labelled 1. ... A botanist notices that the cuticle is not forming properly on one of his plants. (ii) Name the parts labelled A, B, C and D. (iii) What is the unique feature observed in this stage? Palisade cells are column shaped and packed with many chloroplasts. of water at the surfaces of the spongy mesophyll cells in leaves, followed by loss of water vapour through the stomata. (vii) How many other cells are found surrounding this structure as seen in the diagram? Cuticle thickness varies, depending on … 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 the sperm duct. Leaves usually have fewer stomata on their top surface to reduce this water loss. Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem. 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? Transpiration takes place only in green plants. ... 1. anatomical defenses (thorns, spines, thick bark), 2. sticky traps (pitch), 3. toxins. 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. Cells in the leaf are loosely packed. (i) Umbilical cord(ii) Part 2 is Placenta.Functions of the placenta are:1. Join now. Harmful effects of evaporation to plant leaves is minimized. B and C.(ii) Give the main function of each of the parts A. Study the same and then answer the questions which follow: (i) Name the parts labelled A. The first land plants had roots, leaves, and flowers. The equation for photosynthesis is: $\text{carbon dioxide and water} \rightarrow \text{glucose and oxygen}$. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. (v) The stomata are found on the upper and lower epidermis of the leaf. Mention if the following statements are true or false. (iii) The three protective membranes covering the brain:Outer - dura mater, Middle layer of arachnoid andInner pia mater(iv)Neuron. 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==. It does this by diffusing through small pores called, tissue of the leaf. What are the age restrictions for marriage of boys and girls In India? (iv) Mention two structural features of A which help in the function mentioned in (iii) above. Large amount of water gets into the plant. Some of this water evaporates, and the water vapour can then escape from inside the leaf. (iv) The gestation period is 280 days. Read about our approach to external linking. (vi) Transpiration: It is the loss of water as water vapour from the aerial parts of the plant. The turgidity and flaccidity of guard cells help to regulate the closing and opening of the stomata. Plant becomes cool all the time. Plant leaves are adapted for photosynthesis and gas exchange. They are arranged closely together so that a lot of light energy can be absorbed. Solution 2: (a) (i) False (ii) True (iii) True (iv) False … 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. Explaln the term transpiration. These specialised tissues move substances in and around the plant. (False. (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. Adaptations of the leaf for photosynthesis and gaseous exchange, They are adapted for photosynthesis by having a large surface area, and contain openings, called. (True) 6. (v) Two daughter cells are formed from this type of cell division. The leaves are covered by a thick cuticle: In evergreen plants, such as banyan, theleaves remain covered by a thick waxy cuticle. The age restrictions for marriage in India of Boys - 21Girls - 18. These regulate the stomatal opening for transpiration and diffusion of gases and close in order to reduce water transpiration. 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 … Scale Leaves. Leaves are adapted in several ways to help them perform their functions. 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. Activities of the Red Cross:(a) To supply blood to the needy victims of war and calamity. Transpiration. . Sacculus and utriculus are responsible for static equilibrium.2. The leaves are covered by a thick cuticle: In evergreen plants, such as banyan, theleaves remain covered by a thick waxy cuticle. (iii) Wind velocity has an effect on transpiration. Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the. Transpiration helps to cool the plant body. 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. (iv)Name the basic unit of the brain. 2. Other leaves may have small hairs (trichomes) on the leaf surface. They can also reduce the rate of transpiration by blocking air flow across the leaf surface. For both of the reasons it says that the water potential gradient will be reduced as moist air will be close to the stomata. Plants have evolved over time to adapt to their local environment and reduce transpiration (Figure 2). 1. to allow carbon dioxide into the leaf and oxygen out. Sign in, choose your GCSE subjects and see content that's tailored for you. 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. The diagram shows a section of the human brain. Have a glance at the MCQ of Chapter 11 Science Class 7 and cross-check your answers during preparation. Study the same and answer the questions which follow: (i) Name the parts labelled A and B. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. Distribution of water is throughout the plant. ... "Hairy" projections on leaves and stems; reduce transpiration. (b) To arrange ambulance services in emergencies. Leaves enable photosynthesis to occur. (iv) Voltmeter is an instrument used for measuring the rate of transpiration in green plants. Ans. 3. Ask your question. …waterproof outer layer called the cuticle. B, C, D and B. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Log in. (ii) It lowers the rate of transpiration thus conserving water. The fusion of male sperm and female egg takes place inside thefallopian tubes. Leaves usually have fewer stomata on their, Leaves enable photosynthesis to occur. (b) Rewrite the false statements, in (a) above, in the correct form by changing either the first or the last word only. (vii) Five epidermal cells which are also known as accessory cells. Answer: (i) The guard cells are located in the leaves. Three adaptations found in plants to reduce transpiration are as follows:1. B, C and D. (ii) Name the part of the ear responsible for transm1tt1Dg Impulses to the brain. For eg., in Opuntia, the leaves are modified into spines. (True) 3. The function of a leaf is photosynthesis - to absorb light and carbon dioxide to produce glucose (food). Root hairs are the extensions of the outer epidermal cells of the root. B and C.(iii)Name the three protective membranes covering the brain. 13. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Several structural features lessen the rate of transpiration. Three adaptations found in plants to reduce transpiration are as follows:1. bhattsharesta bhattsharesta 15.06.2020 Biology Primary School Transpiration is helpful in the transport of matter 2 Name any three germ-killing secretions of our body. 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. 1. Mention various adaptations by which the plants tend to reduce transpiration. This is because the fallopian tubes are the site of fertilisation. They also reduce water loss due to transpiration. Thick cuticle cover − The waxy layer of cuticle over the epidermis prevents excessive transpiration. (iii) Name the part labelled above which is responsible for. 232, Block C-3, Janakpuri, New Delhi, (iii) The amniotic fluid forms a cushion around the embryo and protects it from jerks and acts as a shock absorber. (iv) Name the audio receptor cells which pick up vibrations. The stomata are surrounded by guard cells, which control their opening and closing. Log in. Roots absorb water and mineral ions through root hair cells and are transported up the plant by the xylem. The diagram given below is that of a developing human foetus in the womb. The diagram below represents the structure found in the Inner ear. When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration. 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. (ii) Give the name of the surgical method represented in the diagram. 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? (iii) Explain the role played by the part labelled 3. It causes around 20% of transpiration in plants. As any other process there are pros and cons of transpiration too. 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. These are plants which have special adaptations to survive in drying, environmental conditions where many plants would become desiccated and die. (iii) Guard cells regulate the opening and closing of the stomata. Download the PDF Sample Papers Free for off line practice and view the Solutions online. 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. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight. The spines act as defensive structures. The cuticle reduces the rate of water loss from the leaf surface. It also helps maintain the temperature of the surrounding region. This reduces the rate of transpiration. Figure 5.21: Desert plants like cactus have thick cuticles to avoid water loss. Stage of a leaf is photosynthesis - to absorb sunlight of leaf. egg takes inside. 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Can result in the palisade mesophyll tissue of the ear responsible for transm1tt1Dg Impulses to the.. Plant leaves is minimized have a water at the same and answer the which... And acts as a shock absorber % of transpiration in green plants 2. sticky (... More transpiration occurs from the air into the leaf losing a lot of energy...