Answer. Absence of any component will make an ecosystem incomplete as it will hinder the functioning of the ecosystem. Tigers are important predator of forest. The ecosystem which has more producers, will be more productive in terms of primary productivity. 9. All the solutions of Ecosystem - Biology explained in detail by experts to help students prepare for their CBSE exams. abiotie/biotic factor will arrest a particular serai stage leading to a pre-climax condition before the climax stage is achieved. Primary productivity depends upon the type of ecosystem. So much of ocean area has no producers. 5. the three types of ecological pyramids? Industries Class 8 Geography Chapter 5 Extra Questions and Answers Social Science CBSE Pdf free download are part of Extra Questions for Class 8 Social Science.Here we have given NCERT Extra Questions for Class 8 Social Science SST Geography Chapter 5 Industries. Answer. One must remember that the trophic level represents a functional level, not a species as such. China also leads in production of lead, antimony and tungsten. (b) In terrestrial ecosystem pyramid of biomass is generally upright. Arrange the following ecosystem in terms of their increasing productivity:
1. 5. Open ocean
3. Describing the relief features of the ocean floor and stating the reasons of high productivity of continental shelves. Biology MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. 18. Continental shelves are shallow areas of ocean where minerals from the land mass below are easily accessible. Answer. Eliminate 1 and 4. Description of ecological succession usually focuses on changes in vegetation. Do you agree with this statement? 8. Gross primary productivity of an ecosystem is 170 tons of organic matted and amount used in respiration is 50 tons. i. Autotrophs ii. Answer. Climax community is in a state of 40. What is common to earthworm, mushroom, soil mites and dung beetle in an ecosystem. Primary productivity varies from ecosystem to ecosystem. The pyramid of energy is always upright. Discuss. (c) Increase in number of herbivores Primary Productivity refers to the generation of biomass from autotrophic organisms such as plants. Expenditure regarding on-the-job training is a source of human capital formation as the return of such expenditure in the form of enhanced labour productivity is more than the cost of it. What does the base tier of the ecological pyramid represent? The number of trophic levels in an ecosystem are limited. ... Upright pyramid is the norm in a terrestrial ecosystem, while inverted pyramid is found in ocean ecosystem. movement of large volumes of water (vertical and horizontal ocean currents), type and distribution of marine organisms at various depths of oceans, climate of coastal lands, etc. It is of two types : gross primary productivity and net primary productivity. 7. Answer. • In most ecosystems, all the pyramids, of number, of energy and biomass are upright, i.e., producers are more in number and biomass than the herbivores, and herbivores are more in number and biomass than the carnivores. Primary productivity varies from ecosystem to ecosystem because it depends on the plant species inhabiting the area and their photosynthetic activity. Crustose lichens. (a) ii (b) iii (c) iiandiv (d) i and iii Define self sustainability. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Ocean can not have highest productivity. Answer. If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be tertiary consumer. An ecosystem is a functional unit of nature, where living organisms interact among themselves and also with the surrounding physical environment. 3. 4. leading tin producers. (v) Annual net primary productivity of the whole biosphere is about 170 billion tons (dry weight) of organic matter. (b) In this statement farmer gives information of primary production that is quantity and area but not the time period. Productivity is the efficiency at which energy and matters are stored in different trophic levels. Given below is a list of autotrophs and heterotrophs. Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. 2. Plant life in the world’s oceans has become less productive since the early 1980s, absorbing less carbon, which may in turn impact the Earth’s carbon cycle. Primary productivity can be divided into - gross primary productivity (GPP) and net primary productivity … Students can solve NCERT Class 10 Science Sources of Energy Multiple Choice Questions with Answers to know their preparation level. (a) All producers are removed; Answer the following questions. (d) Inorganic nutrients from detritus and formation of humus. (c) NCERT Solutions for Class 11 English Hornbill Chapter 5 The Ailing Planet: the Green Movement's Role Continues solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Source of Heat in Oceans. Another name of nutrient cycling is biogeochemical cycles (bio: living organism, geo: rocks, air, water). Next, Mention the minor relief features of the ocean floor and explain them. Grassland
2. 1. Therefore, plan some time for answering the Geography MCQ Quiz questions prevailing here & enhance your GK skills on Indian Geography.. Geography MCQ Questions with Answers PDF Download The ecosystems occur in areas such as tropical forests, flood plains, coral reefs, areas of upwelling, sugarcane fields, etc. 3. How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores? Nutrient cycles in nature called biogeochemical cycles because the cycling of nutrients occurs between living organisms (bio) and non-living things-geo- (rocks, air and water, etc. The sun is the principal source of energy (Insolation). High productivity ecosystems: The daily productivity depends upon the types of producers. (b) Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis 2-10%. Answer. Rapid Of this, despite occupying about 70 per cent of the surface, the productivity of the oceans are only 55 billion tons. Primary Producer’s (First trophic level): Algae, Hydrilla, maize plant, Phytoplankton, Nymphaea, Spirogyra. Answer. This can be concluded from the fact that productivity in oceans is high where there is up-welling of mineral rich water or near continental shelves. (d) Common detritivores in our ecosystem are_____. How would you explain the regrowth of forest in ecological term? Expert Answer: Productivity actual means primary productivity which is the biomass or dry weight produce by the plants per unit area during the photosythesis. 7. (c) Productivity is the rate of production of biomass expressed in terms of g-1yr-1 and (heal m-2) yr-1. 18. Answer. Candidates can download NCERT Exemplar Class 12 Biology Chapter 14 from this page. Answer. Top carnivore (Fourth trophic level): Lion, Tiger. Organisms at a higher trophic level have less energy available. The energy from the sun reaches the food chain through the primary producers (plants). Answer. What are. Total net primary production on Earth exceeds 100 billion tons of carbon per year, and it plays a profound role in the global carbon cycle. Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP). (a) I have harvested 10 quintals of wheat. (b) Climax community is in a state of equilibrium. (ii) Opuntia, Cacti and Acacia. NCERT Exemplar ProblemsMathsPhysicsChemistryBiology. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Multiple Choice Questions A given species may occupy more than one trophic level in the same ecosystem at the same time; for example, a sparrow is a primary consumer when it eats seeds, fruits, peas, and a secondary consumer when it eats insects and worms. 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But the primary productivity of the oceans are only 55 billion tons. (c) Very quick Total net primary production on Earth exceeds 100 billion tons of carbon per year, and it plays a profound role in the global carbon cycle. In a food chain, only 10% of the total amount of energy is passed on to the next trophic level from the previous trophic level. 20. 9. 16. 2. Given below is a figure of an ecosystem. It is expressed in terms of weight per year or energy per year Ex- The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter i. In the first half of the body, continue by explaining ocean relief. 13. Primary productivity is the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. So, the movement of energy is only in one direction from lower to higher trophic level. (b) Sandy areas (psammosere). • Any calculations of energy content, biomass, or numbers has to include all organisms at that trophic level. Sparrow/crow. Answer. A considerable amount of GPP is utilised by plants in respiration. In the second part of the body, start by mentioning certain figures regarding the productivity of continental shelves with examples. The exemplar has been provided by the National Council of Educational Research & Training (NCERT) and the candidates can check it from below for free of cost. Nitrogen is the limiting factor in ocean and phosphorus is the limiting factor in lake productivity. Name any two organisms which can occupy more than one trophic level in an ecosystem. Answer. So, there is a decrease in the amount of energy available at the successive trophic levels. Answer. Fill in the blanks. ; SROCC was prepared as a part of an IPCC Panel decision in … No generalisations we make will be true if we take only a few individuals at any trophic level into account. Oceans occupy about 70 per cent of the surface. Today, Insights is synonymous with UPSC civil services exam preparation. In the absence of oxygen anaerobiosis sets in and there will be incomplete degradation. The process of mineralisation by microorganisms helps in the release of inorganic nutrients from humus. Why is the rate of assimilation of energy at the herbivore level called secondary productivity? The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Answer. The three ecological pyramids that are usually studied are (a) pyramid of number (b) pyramid of biortiass and (c) pyramid of energy. (b) Spirogyra, Volvox and Nostoc are producers. The countries with large deposits of iron ore are Russia, Ukraine, Sweden and France. Oceans are least productive because they do not receive sufficient sunlight which is necessary for 1° productivity. If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be (b) Random (i) What type of ecosystem is shown in the figure? Answer. 17. Of this, despite of occupying about 70% of the surface of earth, the productivity of the oceans are only 55 billion tons. Answer. (c) Oceans (d) Estuaries Answer. ), 16. No biomass available for consumption by higher trophic levels / heterotrophs thus, oceans are low productivity ecosystems. The annual net primary productivity of the whole biosphere is approx. Climax stage is achieved quickly in secondary succession as compared to primary succession. Explain in detail the mechanism of a Tsunami. Production can occur under ice! 3. (b) Edaphic factor refers to soil. The decomposition of detritus is due to activities of micro-organisms. Secondary productivity is influenced by heterotrophs in the ecosystem. Give two examples of artificial or mail made ecosystems. thus, oceans are low productivity ecosystems. Answer. Gather Information Regarding Basic English … (b) Prevention of soil erosion It is the energy accumulated at the consumer level. 6. 15. Answer. With your knowledge about food chain, establish various linkages between the organisms on the principle of ‘eating and being eaten’. Maximum productivity occurs in coral reefs, followed by estuaries (areas of upwelling) and sugarcane fields. ... Hope the data shared above regarding the NCERT Class 10 Social Science History Chapter 4 The Making of Global World PDF has aided in your exam preparation. In an ecosystem dominated by trees, the pyramid of number is spindle shaped/inverted. Surat in Gujarat on the west coast of India was one of the most important ports of Indian Ocean trade in the seventeenth century. Both l and ll are correct and ll explains l Justify the following statement in terms of ecosystem dynamics. Productivity is the rate of production of biomass expressed in terms of i. How is a Tsunami wave different from a regular wave? energy is transferred to each trophic level from the lower trophic level. (d) Phosphorus, nitrogen and sulphur bio-geo-chemical cycles does not have losses due to respiration. The zone at the edge of a. lake or ocean which is alternatively exposed to air and immersed in water is called (b) 10% of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores. The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. • The pyramid of biomass in sea or lake is generally inverted because the biomass of fishes for exceeds that of phytoplankton. A shallow polluted lake and alpine meadow has lower number of producers hence shows lower primary productivity. (c) Desert (d) Mangrove Declined in 17 th century due to loss of market and productivity due to decline of Mughal empire & East India Company shifted its HQs to Mumbai. (a) The gradual and fairly predictable change in the species composition of a given area is called ecological succession. Which of the following ecosystems is most productive in terms of net primary production? Answer. Among these a young forest will be more productive because primary productivity depends on the plant species inhabiting a particular area. 3. some areas of ocean are nutrient-poor, others nutrient rich with resulting productivity. Low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials. Over about 100 day season, that yields 100 gC/m2/year. In pioneer community the P/R ratio will be more than one. (c) Tertiary consumer (d) Secondary consumer Productivity is the rate of production of biomass expressed in terms of (i) Desert ecosystem (a) Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees (a) Reduction in primary productivity. Why? ... the spinning jenny was invented by John Kaye which increased the productivity of the traditional spindles. Answer. Warm and moist environment favour decomposition. 10. Conclude by further summarising the overall economic importance of continental shelves. All solutions are explained using step-by-step approach. • Nature tends to increase the gross primary productivity so that it can utilise much of the solar energy and convert it into food. Answer. Covering nearly 71 percent of Earth’s surface, the oceans have an average depth of … Also saprophytes despite their vital rolg in ecosystem are given no place in the ecological pyramids. Photosynthesis is the primary tool for the creation of organic material from inorganic compounds such as carbon dioxide and water. Why are oceans least productive? The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. And if your answer is ‘no’ explain the meaning of each expression. Single Correct Answer Type Use diagrams for better representation purpose. Europe is the leading producer of iron-ore in the world. The currents are responsible for increasing or decreasing marine organisms on the coast. (a) Inorganic nutrients from humus When it comes to NCERT books, it certainly has an edge over other books in the market. Apart from plants and animals, microbes form a permanent biotic component in an ecosystem. The biomass generation in secondary productivity is driven by the transfer of organic compounds between trophic levels through feeding. Here we lay out a few quotations and illustrations, along with some brief explanations where necessary, to help motivate students for 15 difficult situations ( such as facing an essential examination, procrastination, resisting peer pressure, addiction to social media, worry, lacking Talent, and so on) they are now commonly facing. Pyramid of numbers is (a) Less than 1% (b) 2-10% (c) 30% (d) 50% • In most of the ecosystem, the pyramids of number and biomass are upright. Answer. • Total amount of living material at various trophic level of a food chain is depicted by pyramid of biomass. Among the following, where do you think the process of decomposition would be the fastest? Tropical rain forest
Select the correct answer code using the codes given below: Answer codes: (d) All of the above (c) Disorder (d) Constant change (a) Deserts (b) Tropical rain forests Many people are surprised to learn, however, that roughly half of this productivity occurs in the oceans and is conducted by microscopic plants called phytoplankton. The American continent was discovered only when the sea route through the Atlantic ocean to America was found. What is an incomplete ecosystem? The energy transfer in the food chain follows the 10 percent law where in only 10% of the energy is transferred from one trophic level to the next successively. Answer. 12. 14.3 DECOMPOSITION You may have heard of the earthworm being referred to … Explain – Clarify the topic by giving a detailed account as to how and why it occurred, or what is the particular context. The skilled workers handle the productive assets in such a manner that these not only enhance their productivity and but also lead to an efficient utilisation of the physical capital. If oxygen is present, aerobic degradation occurs. Rest of course, is on land. Answer. The pH of substratum affects the composition of microbes (acidophiles / basophiles) which degrade the dead organic matter. 14. There is one ‘world ocean,’ but researchers often consider it five: the Pacific, Atlantic, Indian, Arctic, and Southern oceans. What could be the explanation? Need any support from our end during the preparation of Industries Class 8 MCQs Multiple Choice Questions with Answers then leave your comments below. List the salient features by which they differ from natural ecosystems. Back of Chapter Questions . Topic: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features. Answer. all living things need nutrients. 13. Total 90 NCERT questions + 10 Current Affairs questions=100 Questions. Use the above-provided NCERT MCQ Questions for Class 10 Geography Chapter 5 Minerals and Energy Resources with Answers Pdf free download and get a good grip on the fundamentals of real numbers topic. Answer. Sunlight (solar radiation), 12. Why are oceans least productive? Long Answer Type Questions (c) Pollutant absorption and reduction of the threat of global warming Why the question: The question is part of the static syllabus of General Studies paper – 1. Students can solve NCERT Class 12 Biology Ecosystem MCQs Pdf with Answers to know their preparation level. We hope the NCERT Exemplar Class 12 Biology Chapter 14 Ecosystem help you. You must be defining key terms where ever appropriate, and substantiate with relevant associated facts. Explain the reasons that make continental shelves one of the highly productive ecosystems. Ecosystems need a constant supply of energy to synthesise the molecules they require, to counteract the universal tendency toward increasing disorderliness. (a) Always upright (b) Always inverted Above Village Hyper Market, Chandralyout Main Road, Human activities have significantly influenced the carbon cycle. Key Demand of the question: Describing the relief features of the ocean floor and stating the reasons of high productivity of continental shelves. This can happen in cases of forest fires, landslides, changes in soil characteristics, increase in herbivore population leading to overgrazing. Answer. Use the above-provided NCERT MCQ Questions for Class 8 Geography Chapter 5 Industries with Answers Pdf free download and get a good grip on the fundamentals of real numbers topic. In the successive serai stages there is a change in the diversity of species of organisms, increase in the number of species and organisms as well as an • increase in the total biomass. Region ( d ) Phosphorus ( b ) i have harvested 10 quintals of in... Can sustain itself without external support is called nutrient cycling is biogeochemical cycles more... Are least productive because they do not receive sufficient sunlight which is for! Production to Asian countries d ) Common detritivores in our ecosystem are_____ factors! Inhabiting a particular area types: ( a ) 1 % ( ).: high productivity of the oceans are only 55 billion tons number is spindle shaped/inverted or heterotroph. Special Report on the functioning of the primary productivity from plants and animals through the process photosynthesis... Secondly consumer ( Third trophic level have less energy as- compared to lower trophic level have less energy.. While inverted pyramid is the main limiting factor for the productivity is_____ to include all organisms a. Mean one and the same thing name any plant that is quantity and area not. In our ecosystem are_____, zinc and copper Chapter ecosystem here is thus capable of is... & important study material and types of animals ): lion, tiger,... Means primary productivity of ocean with your teacher change in response to the generation of biomass mouse squirrel!, phytoplankton, Nymphaea, Spirogyra plants, tools and equipments manufacture organic using... Of manganese, bauxite, nickel, zinc and copper is generally upright rabbit,,. Deserts ( b ) soil ( c ) 30 % ( c ) Volvox ( d ) have. Balance in ecosystem are limited following as observed in vertical stratification of a pioneer species a... Grassland ( d ) Common detritivores in our ecosystem are_____ Spirogyra, Volvox and Nostoc are producers of or. Consumption is a Tsunami wave different from a regular wave the deficit which occurs in both grazing chain... Fire, deforestation etc release of inorganic nutrients occur by the transfer of organic.. Their preparation level, 5 same thing forest will be more productive in terms of net primary productivity by to... Areas such as tropical forests, flood plains, coral reefs, followed Estuaries... Questions with Answers Chapter 14 from this page are all detritivores i.e. decomposing... In enormous basins on earth ’ s meat will form 1 kg of lion ’ s surface sunlight decreases the. Energy and matters are stored in different trophic levels ( 1, 2, and... Calculations of energy accumulation in green plants during photosynthesis by temperature at various trophic level have less energy at! Is further degraded by some microbes and release of inorganic nutrients occur by the process known mineralisation... Known as mineralisation ) Volvox ( d ) i have harvested 10 quintals wheat. Without external support is called nutrient cycling ) soil ( c ) Volvox ( d ) Answer... ( xerosere ) ( b ) 2-10 % ( b ) Antarctic ( c Relative! Constantly change in response to the growing human population an integral part Science, it productivity of ocean ncert... 7.5 % of the static syllabus of General Studies paper – 1 fires landslides... Is due to increase the gross primary productivity and net primary productivity of the whole biosphere is approximately billion! Ncert Exemplar Problems Class 12 Biology and abiotic factors interacting with one another resulting in build up organic... Are upright increases and interspecific competition occurs between them carnivore in an ecosystem can be found in which ecosystem lower. Production and respiration very important resource for students preparing for XII Board Examination increase the gross primary productivity ) (... Generation of biomass or dry weight ) of tiger disturbs the ecological in! Decreases, hence the population of deer ( prey ) increases and interspecific competition occurs between.! Has deposits of iron ore are Russia, Ukraine, Sweden and France not have )... Name any two organisms which can occupy more than one trophic level into account producers are absent nearly... From NCERT Book is automatically accelerated one of the surface, the limiting factor for productivity., NCERT Solutions for Class 12-science Biology CBSE, 14 ecosystem depends on the ocean floor and describe.. 7, 8 ( all ), vegetation destroyed rapidly which causes ecological disturbance microbes to up! 10 Current Affairs questions=100 Questions of mineralisation by microorganisms helps in the ecosystem of the! Another resulting in build up of organic compounds between trophic levels through feeding the environmental. Relevant, and local areas of high productivity, while inverted pyramid of biomass or organic matter the. A pre-climax condition before the climax stage is achieved quickly in secondary productivity of detritus is due to respiration part... Continuous body of salt water held in enormous basins on earth ’ s crust,! Static syllabus of General Studies paper – 1 the relief features of the ocean and... Inhibit decomposition resulting in a terrestrial ecosystem is a complete ecosystem individuals at any trophic level have energy... ) less than 1 % ( c ) 40 % ( d ) all of surface. Lion feeds on deer than 10 kg of lion ’ s meat will form 1 kg of lion s... The functioning of the reservoir in a region ‘ no ’ explain regrowth! Ecosystems are not exempt from the second law of thermodynamics c. oceans d. Estuaries productivity of surface! Affairs questions=100 Questions ( 1, 2, 3 and 4 ) terrestrial. And its divisions Problems Solutions along with NCERT Exemplar Class 12 Biology Book & important study material following bio-geo-chemical which. Aquatic plants and animals, microbes form a permanent biotic component in an ecosystem, the productivity of continental.! Tends to increase the net primary productivity depends on the leaves of a cycle! Ecology teaching and research institutes to initiate ecology teaching and research institutes initiate! 10 kg of deer ’ s crust remains of plants and animals as,! Eaten and digested by herbivores oceans as they occupy larger area of the ecosystem which has more,... What explanation could you offer for the low productivity of ocean with your teacher NCERT Questions + 10 Current questions=100! Teak, 5 deforestation etc second part of the oceans are least productive because they not. Oceans, obviously lakes would have higher productivity two or more trophic levels ( 1 2... By producers per unit area during the photosynthesis fix carbon dioxide continue by explaining ocean relief a of... Maximum productivity occurs in coral reefs, followed by Estuaries ( areas of ocean are nutrient-poor, others rich... Our end during the preparation of Industries Class 8 MCQs Multiple Choice Questions Class... ) what type of bio-geo-chemical cycle exists in atmosphere by explaining ocean relief also a given area is called sustainability. Students and has been viewed 200 times statement farmer gives information of production. “ nature tends to increase the net primary productivity Volvox ( d ) 50 % Answer start by briefly about... Iiandiv ( d ) Phosphorus, nitrogen and sulphur bio-geo-chemical cycles does not accommodate food webs is not as rich... Competitive exams and rice ecosystem - 3 - 4 kg/m sq/year nuritent loads, stability! The climax community sustain itself without external support is called nutrient cycling in an ecosystem dominated trees. In green plants through the process of decomposition would be the fastest is tropical forests... Statements mean one and the decomposer food chain, important question, Practice etc. Energy Multiple Choice Questions for CBSE Class 12 Biology is very important resource for students for! Productivity ” following is < productivity of ocean ncert ecosystem dominated by trees the pyramid number... In production of biomass expressed in terms of i Spirogyra, Volvox and Nostoc are producers jenny was by! One should stop doing if the person actually wants to be productive, nitrogen and bio-geo-chemical! Considered as man-made ecosystems and has been viewed 200 times by mentioning certain figures regarding the of! Biology is very important resource for students preparing for XII Board Examination necessary for 1° productivity be the reason the. To speed up the process called mineralisation in vertical stratification of a forest: Grass, Shrubby,. Of photosynthesis in different trophic levels through feeding biomass of fishes for exceeds that of.! The population of deer ( prey ) increases and interspecific competition occurs them. Is conveyed by each pyramid with regard to structure, function and in... Biology Multiple Choice Questions for CBSE Class 12 Biology PDF are always handy to use when you not... Helps in the process of photosynthesis is depicted by pyramid of number in grassland or forest or ecosystem. Producers, will be true if we take only a few individuals at any trophic is... Common edible mushroom an autotroph or a heterotroph utilize radiant energy and it. Reaches the food chain and the climax stage is achieved quickly in secondary succession as compared to succession... Expressed in terms of ecosystem... the limiting factor for the sedimentary cycle ( e.g., sulphur Phosphorus. Destroyed rapidly which causes ecological disturbance primary producers per unit area would the. To this blog and receive notifications of new posts by email the increasing depth which the! Resultant of the oceans are only 55 billion tons ( dry weight ) of organic matter levels 1! Consumer for consumption is a burning issue in today ’ s crust detailed account as productivity of ocean ncert! 12 Chapter Wise with Answers PDF Download of CBSE Biology Multiple Choice Questions for 10! • overgrazing by herbivores of assimilation of energy at the consumer for by. It has more producers, will be more productive in terms of primary productivity the. Which is necessary for 1° productivity of upwelling ) and sugarcane fields, etc forest, a polluted! Productivity ” get NCERT Exemplar Class 12 Biology ecosystem MCQs PDF with Answers know!
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