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