Transpiration in plants requires all of the following except? We have provided Getting to Know Plants Class 6 Science MCQs Questions with Answers to help students understand the concept very well. Plants wilt and may die if they lose too much water. 13) All of the following describe an important transport mechanism in plants except. It is simply because of this reason that all plants show a daily periodicity of transpiration rate. Plants are responsible for 10% of the water vapor present in the atmosphere. What is evapotranspiration Such plants usually have a much thicker waxy cuticle than those growing in more moderate, well-watered environments (mesophytes). temperature. Transpiration Is Also Linked To Other Processes In Plants, Including Photosynthesis And The Transport Of Mineral Nutrients. Transpiration is the discharge of water vapor from the leaves of plants into the atmosphere. Transpiration rates are affected by all of the following EXCEPT _____. (E) At noon, the rate of transpiration exceeds the rate of water flow through a stem. Choose the correct pair from the following. The liver is a vital organ that performs all of the following functions EXCEPT Plants contain a vast network of conduits which consist of xylem and phloem. Transpiration, in botany, a plant’s loss of water, mainly though the stomates of leaves. C) evaporation of water molecules. Answer: Transpiration is a necessary evil in plants because it is inevitable but potentially harmful. Light or Illumina­tion 3. (D) The rate of transpiration never reaches zero. Many are photosynthetic. It is known that a large oak tree can transpire 40,000 gallons (151,000 liters) per year. 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. 10. B. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. Question 2 answers. E. Transport Through Tracheld. A. Roots consume some amount of water from the soil and the rest evaporates in the atmosphere. 5. c. burning of fossil fuels. 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 17. The remaining 97–99.5% is lost by transpiration and guttation. Definition of Transpiration. D) transport proteins E) xylem membranes. The apparatus shown here is Ganong's photometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. C. Many live in extreme environments such as hot springs and deep sea vents. C. Evaporation Of Water Molecules. 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 (iii) The excess of water gets removed through transpiration. Active transport of various materials in plants at the cellular level requires all of the following except A) a proton gradient. E) bulk flow from source to sink. Evolution. ; 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. Darwinism explains all the following except. Which of the following is an advantage of tracheids over vessels for long-distance transport to great heights? 2.Which one of the following will not directly affect transpiration? A) cohesion-tension-transpiration. Each plant part takes care of its own gas exchange needs 2. D. Active Transport Through Xylem Vessels. B) osmosis. Transpiration in plants requires all of the following except. An average oak tree transpires approximately 40,000 gallon water in a year. Gas diffusion in plants occurs easily over long distances in plants 4. Fast moving air currents continually bring fresh, dry masses of air in contact with leaf surfaces and thus maintain a high rate of transpiration. 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. ADVERTISEMENTS: The following points highlight the six main factors affecting transpiration in plants. a.adhesion of water molecules to cellulose b.active transport of water into the stele c.evaporation of water molecules. b. transpiration. Soil Water Content: d. decomposition of plants and animals. transpiration. D. Estimates project that there are more than one billion species. 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. Transpiration is the evaporation of water from plants. 3. Identify the exception. Opening of stomata requires. In plants, water is the medium of transport. B) phloem. Soil Factors. Plants have evolved over time to adapt to their local environment and reduce transpiration. 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 … This is because of the process of transpiration. The water lost during transpiration is a side effect of the plant's exchange of gases. Transpiration in plants requires all of the following except active transport through xylem cells. In the case of transportation in plants, the biggest constraint is water as it ends up being a limiting factor in growth. active transport through xylem cells. relative humidity. All of the following changes would be likely to decrease the rate of transpiration at 8 A.M. A) adhesion of water molecules to cellulose. Transpiration is a necessary evil in plants. 14) Water entering the stele of the root from the cortex must pass through the. A) Casparian strip. sunlight. Parts of plants such as stems, small pores on leaves, and flowers evaporate the water to the atmosphere. All veins carry deoxygenated blood except the pulmonary vein which carry oxygenated blood from the lungs to the heart. 1. 2. Answer: E Wind Velocity: The velocity of wind greatly affects the rate of transpiration. increases, the rate of absorption of water by the root increases too. To overcome this problem, trees and other plants have the perfect system for the absorption and translocation of water. Cohesion theory of water transpiration in plants was given by. D) active transport through xylem cells. Factor # 1. Question 5. Temperature 4. Each living cell in a plant is located quite close to the surface of plant Wind 5. All parts of the body are connected to these tissues. C) endodermal cytoplasm. 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. 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. 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. B) ATP. It is a process that the eye cannot see, even though the amounts of moisture involved it significant. 33) Transpiration in plants requires all of the following except. (a) Temperature (b) Light (c) Wind speed (d) Chlorophyll content of leaves B. Cohesion Between Water Molecules. Carbon cycles through the biosphere in all of the following processes EXCEPT a. photosynthesis. This substantial water loss per CO 2 fixed is generally not a problem when plenty of water is available for transpiration. ... Odisha JEE 2008. However, the plant derives some benefit from this water loss in the form of. Humidity of Air 2. Plants in such environments often have a high g w v total, which leads to a somewhat higher g C O 2 total and somewhat higher rates of photosynthesis than is the case for plants with a moderate g w v total. Check the below NCERT MCQ Questions for Class 6 Science Chapter 7 Getting to Know Plants with Answers Pdf free download. In higher plants (vascular plants) xylem conducts the water whereas the phloem conducts the food. Question: Transpiration Provides The Driving Force For The Movement Of Water From The Soil To The Highest Leaves Of Plants. If the rate of transpiration. Humidity of Air: As transpiration involves diffusion of water vapour from regions of high concentration (intercellular spaces of […] This process also helps in ascent of sap and transportation of water and minerals to the various parts of the plants. B) cohesion between water molecules. (ii) The carbon dioxide which is produced during the process of respiration also gets removed through stomata. Explain. Atmospheric Pressure 6. D) active transport. 4. Plants and animals have a system of transporting substances throughout their body. EXCEPT (A) causing the stomata to close (B) increasing the humidity of the atmosphere Plants can get along without respiratory organs because of all the following except: 1. The factors are: 1. Reverse osmosis is used in removing salts from saline water and extra purification of water. 3. Transpiration is important for plants because it evaporates excess water which produces a cooling effect to plants. Desert plant (xerophytes) and plants that grow on other plants (epiphytes) have limited access to water. C) membrane potential. 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. 4. Plants do not present great demands for gas exchange. Himachal Pradesh PMT 2005. Question: Transpiration In Plants Requires All Of The Following Except: A. Adhesion Of Water Molecules To Cellulose. The process requires a driving force, viz, pressure from a pump, to push the fluid through the membrane. They are prokaryotic. NEET 2020. d.cohesion between water molecules e.transport through tracheids E) transport through tracheids. 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