A. Cohesion theory of water transpiration in plants was given by. Transpiration in plants involves all of the following except: a) Adhesion of water molecules to cell walls b) Cohesion among water molecules c) Water transport through phloem cells d) Movement of water molecules through stomata Answer: c) Water transport through phloem cells E) transport through tracheids. This is because of the process of transpiration. Identify the exception. (ii) The carbon dioxide which is produced during the process of respiration also gets removed through stomata. Light or Illumination 3. B) ATP. Temperature 4. D) active transport. increases, the rate of absorption of water by the root increases too. 3. 13) All of the following describe an important transport mechanism in plants except. D. Active Transport Through Xylem Vessels. B) cohesion between water molecules. Carbon cycles through the biosphere in all of the following processes EXCEPT a. photosynthesis. C. Evaporation Of Water Molecules. (a) Temperature (b) Light (c) Wind speed (d) Chlorophyll content of leaves Humidity of Air 2. They are prokaryotic. Question: Transpiration In Plants Requires All Of The Following Except: A. Adhesion Of Water Molecules To Cellulose. Question 2 answers. 14) Water entering the stele of the root from the cortex must pass through the. Question: Transpiration Provides The Driving Force For The Movement Of Water From The Soil To The Highest Leaves Of Plants. A) Casparian strip. B) phloem. E. Transport Through Tracheld. This process also helps in ascent of sap and transportation of water and minerals to the various parts of the plants. relative humidity. 2.Which one of the following will not directly affect transpiration? All of the following changes would be likely to decrease the rate of transpiration at 8 A.M. In the case of transportation in plants, the biggest constraint is water as it ends up being a limiting factor in growth. EXCEPT (A) causing the stomata to close (B) increasing the humidity of the atmosphere Evolution. To overcome this problem, trees and other plants have the perfect system for the absorption and translocation of water. Answer: E B. Cohesion Between Water Molecules. Wind Velocity: The velocity of wind greatly affects the rate of transpiration. Plants do not present great demands for gas exchange. Transport in plants Xylem moves water from roots to the leaves, and phloem moves food from the leaves to the rest of the plant. Stomates are necessary to admit carbon dioxide for photosynthesis and to release oxygen, hence transpiration is generally considered to be merely an unavoidable phenomenon that accompanies the real functions of … E) bulk flow from source to sink. It is known that a large oak tree can transpire 40,000 gallons (151,000 liters) per year. C) membrane potential. Transpiration in plants requires all of the following except active transport through xylem cells. ADVERTISEMENTS: The following points highlight the six main factors affecting transpiration in plants. Gas diffusion in plants occurs easily over long distances in plants 4. 2. All of the following are results of the process EXCEPT (A) an increase in substance X (B) increased activity of enzyme 6 (C) decreased activity of enzyme 4 (D) increased activity of enzyme 5 (E) a decrease in substance D. 11. Plants have evolved over time to adapt to their local environment and reduce transpiration. Roots consume some amount of water from the soil and the rest evaporates in the atmosphere. Atmospheric Pressure 6. Many are photosynthetic. C. Many live in extreme environments such as hot springs and deep sea vents. Fast moving air currents continually bring fresh, dry masses of air in contact with leaf surfaces and thus maintain a high rate of transpiration. 10. Plants wilt and may die if they lose too much water. Transpiration, in botany, a plant’s loss of water, mainly though the stomates of leaves. Most of the water absorbed by the roots of a plant– as much as 99.5 per cent– is not utilized for growth or metabolic process; it is excess water, and it leaves the plant through transpiration. Each living cell in a plant is located quite close to the surface of plant Biology Most Viewed Questions. (iii) The excess of water gets removed through transpiration. The process requires a driving force, viz, pressure from a pump, to push the fluid through the membrane. Definition of Transpiration. sunlight. 5. transpiration. Darwinism explains all the following except. Transpiration is the process in which plants release the water inside it in the form of moisture or water vapor. All veins carry deoxygenated blood except the pulmonary vein which carry oxygenated blood from the lungs to the heart. In higher plants (vascular plants) xylem conducts the water whereas the phloem conducts the food. Opening of stomata requires. Factor # 1. It is simply because of this reason that all plants show a daily periodicity of transpiration rate. It is a process that the eye cannot see, even though the amounts of moisture involved it significant. Transpiration is the evaporation of water from plants. C) endodermal cytoplasm. The apparatus shown here is Ganong's photometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. C) photorespiration. Each plant part takes care of its own gas exchange needs 2. B. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl 2) contained in two small vials were weighted and placed in both the cups.The ends of the cups were weighted and with corks through which two mercury manometers were connected. Soil Factors. Transpiration in plants requires all of the following except. Transpiration is important in plants for three major reasons: Cooling of the plant: the loss of water vapour from the plant cools down the plant when the weather is very hot. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. D) active transport through xylem cells. D. Estimates project that there are more than one billion species. An average oak tree transpires approximately 40,000 gallon water in a year. All parts of the body are connected to these tissues. Transpiration Is Also Linked To Other Processes In Plants, Including Photosynthesis And The Transport Of Mineral Nutrients. active transport through xylem cells. 17. Plants take part in respiration all through their life as the plant cell needs the energy to survive, however, plants breathe differently, through a process known as Cellular respiration. Which of the following is an advantage of tracheids over vessels for long-distance transport to great heights? Plants can get along without respiratory organs because of all the following except: 1. 4. 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 c. burning of fossil fuels. Such plants usually have a much thicker waxy cuticle than those growing in more moderate, well-watered environments (mesophytes). Check the below NCERT MCQ Questions for Class 6 Science Chapter 7 Getting to Know Plants with Answers Pdf free download. (E) At noon, the rate of transpiration exceeds the rate of water flow through a stem. temperature. The factors are: 1. Question 5. Plants and animals have a system of transporting substances throughout their body. Transpiration in plants requires all of the following except? 4. 1. NEET 2020. 33) Transpiration in plants requires all of the following except. Choose the correct pair from the following. In plants, water is the medium of transport. However, the plant derives some benefit from this water loss in the form of. d.cohesion between water molecules e.transport through tracheids Humidity of Air: As transpiration involves diffusion of water vapour from regions of high concentration (intercellular spaces of […] Transpiration is a necessary evil in plants. Himachal Pradesh PMT 2005. (D) The rate of transpiration never reaches zero. Transpiration, the loss of water vapor from plants, is a physical process that is under control of both external physical and physiological factors.Solar radiation provides the energy source for transpiration. Transpiration is the discharge of water vapor from the leaves of plants into the atmosphere. All of the following are characteristics of bacteria except one. Active transport of various materials in plants at the cellular level requires all of the following except A) a proton gradient. If the rate of transpiration. b. transpiration. Wind 5. Transpiration rates are affected by all of the following EXCEPT _____. C) evaporation of water molecules. ; The transpirational pull: when the plant loses water through transpiration from the leaves, water and mineral salts from the stem and roots moves, or is `pulled', upwards into the leaves. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. B) osmosis. The method used by plants to get rid of excretory products are as follows: (i) The oxygen, end product of the photosynthesis gets removed through stomata. Find out what is transpiration, when it takes place and what is its importance. Answer: Transpiration is a necessary evil in plants because it is inevitable but potentially harmful. Parts of plants such as stems, small pores on leaves, and flowers evaporate the water to the atmosphere. 3. Desert plant (xerophytes) and plants that grow on other plants (epiphytes) have limited access to water. A) adhesion of water molecules to cellulose. Reverse osmosis is used in removing salts from saline water and extra purification of water. Soil Water Content: A) cohesion-tension-transpiration. The water lost during transpiration is a side effect of the plant's exchange of gases. We have provided Getting to Know Plants Class 6 Science MCQs Questions with Answers to help students understand the concept very well. Transpiration is important for plants because it evaporates excess water which produces a cooling effect to plants. This substantial water loss per CO 2 fixed is generally not a problem when plenty of water is available for transpiration. Explain. What is evapotranspiration Plants are responsible for 10% of the water vapor present in the atmosphere. 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