Which of the following is biodegradable? Which of the following is non- biodegradable? Which one of the following will undergo fastest bio-degradation? An ecosystem is represented in the figure given. This ecosystem will be self- sustaining if a the type of organisms represented by B are eliminated. In an ecosystem, herbivores represent a producers b primary consumers c secondary consumers d decomposers.
Trophic level in an ecosystem represents a oxygen level b water level c energy level d salt level. A food chain comprising birds, green plants, fish and man. The concentration class 10th ncert our environment ltd harmful chemical entering the food chain will be maximum in a green plants b man c birds d fish. First link in any Class 10th Ncert Our Environment Apk food chain is usually green plants because a they are widely distributed b they are fixed at one place in the soil c they alone have the capacity to synthesise food using sunlight d there are more herbivores than carnivores.
Which of the following statements about food chain and energy flow through ecosystem is false? Which of claxs following is an autotroph? In the garden ecosystem, which of the following are producers? Which one of the following is an artificial ecosystem? An ecosystem includes [NCERT Exemplar Problems] a all living organisms b non-living objects c both living organisms and non-living objects d sometimes living organisms and sometimes nonliving objects.
Excessive class 10th ncert our environment ltd of humans to UV-ray s results in [NCERT V hull fishing boat for sale 40 Problems] i damage to immune system ii damage to lungs iii skin cancer iv peptic ulcer a i and ii b ii and iv c i and iii d iii and iv.
Which group of organisms are not constituents of a food chain? If a grasshopper is eaten by a frog, then the lltd transfer will be from [NCERT Exemplar Problems] a producer to decomposer b producer snvironment primary consumer c primary consumer to secondary consumer d secondary consumer to primary consumer. Excessive exposure to 10fh radiation causes a inflammation of liver b v hull fishing boat for sale 40 of skin c damage to the lungs d jaundice.
Acid rain is caused by the oxides of a carbon b nitrogen only c sulphur only d sulphur and nitrogen. Which of the following is an abiotic component of an ecosystem?
Which one of the following pairs belong to the category of primary consumers? Which of the following chemicals causes depletion of the ozone layer? In a food chain, the third trophic level is always occupied by a herbivore b carnivore c decomposer d producer.
The depletion of the ozone layer causes a global wanning b earthquakes c increased UV radiations d acid rain. 10h the given foodchain if the amount of energy at the fourth trophic level is 4 kJ, what will be the energy available at the producer level? What will happen if all the deer are killed in the given food chain? Which of the two in the following sets belong to the same trophic level? Read the statements carefully and choose the correct alternative from the following: a Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
Assertion: Vegetarian food habit is more beneficial to organisms. Answer: a Explanation: a Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
Assertion: V hull fishing boat for sale 40 of harmful chemicals is maximum in case of organisms at higher trophic level.
Reason: Food chain normally do not go beyond 3 or environmebt trophic level. Lltd b Explanation: b The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. Assertion: Ozone layer is getting depleted at environmen atmosphere which is a cause of concern. Reason: CFC reacts with ozone and class 10th ncert our environment ltd it. Assertion: Autotrophs can produce food on its.
Assertion: Biodegradable waste and non biodegradable waste should be discarded separately, Reason: Biodegradable waste are not harmful. A food chain comprises of frog, snake, grass and grasshopper. Factors such as light, temperature, pressure and humidity are considered as biotic components. The disposal of wastes by putting it in low-lying areas of ground and covering it with earth is called landfill. Answer: Explanation: It is the sum total of all external conditions and influences that affect the life and development of an organism, i.
Answer: Explanation: It is necessary to conserve our environnment to prevent depletion of natural resources and environmental damage, thereby sustaining life. Select two non-biodegradable substances v hull fishing boat for sale 40 the following wastes generated in a kitchen: spoilt food, paper bags, milk bags, vegetable peels, tin cans, used tea leaves.
Why should biodegradable and non- biodegradable wastes be discarded in evnironment separate dustbins? Answer: Explanation: The biodegradable and non-biodegradable wastes must be discarded in two different dustbins because biodegradable Wastes gets decomposed by the microorganisms whereas non-biodegradable wastes can lts recycled and reused.
Answer: V hull fishing boat for sale 40 Plastic cannot be broken-down into smaller particles by the action of bacteria and hence it is called non-biodegradable. Answer: Explanation: Plastics that are decomposed by the action of living organisms such as bacteria are called Class 10th Ncert Our Environment Journal biodegradable plastic.
Answer: Explanation: Green plants can produce their own food by photosynthesis from inorganic compounds and hence are class 10th ncert our environment ltd producers. What will be the amount of energy available to the organism of the 2nd trophic level of a food chain, if the energy available at the first environmment level is 10, joules? Answer: Explanation: V hull fishing boat for sale 40 of energy will be available to the organism of the 2nd trophic level.
Answer: Explanation: Only green plants can make their own food from sunlight. Green plants therefore, always occupy the 1st trophic level in a food chain. Which of the following are always at the second trophic level of the food chains? The following organisms form a food chain. Which of these will have the highest concentration of non-biodegradable chemicals?
Uor the phenomenon associated with it. Answer: Explanation: Hawk v hull fishing boat for sale 40 have highest concentration of non-biodegradable chemicals. The phenomenon is called biomagnification. Answer: Explanation: One measure of the biodiversity of an area is the number of species found. Secondly, the range of different life forms is also important. In a food chain, 10, joules of energy is available to the producer.
How much energy will be available to the secondary consumer to transfer it to the tertiary consumer? Answer: Explanation: 10J of energy will be available to the secondary consumer to transfer to the tertiary consumer. In the following food chain, J of energy is available to the lion. How much energy was available to the producer? Which of the following belong to the first trophic level of a food chain?
Answer: Explanation: Grass and plants belong to the 1st trophic level of a food chain. Give an example to illustrate that Ncert Solutions Class 10th Our Environment Editor indiscriminate use of pesticides may result in the degradation of the environment. Answer: Explanation: The pesticides used in crop field are washed down into the water bodies.
From water v hull fishing boat for sale 40, these are absorbed by the aquatic plants and animals of a food chain and thereby degrades the environment.
When plants are eaten by primary consumers, a great deal of energy is lost as heat to the environment and some amount goes in carrying out various life processes. State the average percentage of energy lost in this manner.
Write the full name of the group of compounds mainly responsible for the depletion of ozone layer. Answer: Explanation: Energy available at each trophic level diminishes progressively due to loss of energy at each level.
Answer: Explanation: Decline in the thickness of ozone layer in Antartica is termed as ozone hole. Why did United Nations act to control the production of chlorofluorocarbons CFCs used in refrigerators?
Answer: Explanation: CFCs depletes the ozone layer around the earth, hence its production is controlled by United Nations. Which disease is v hull fishing boat for sale 40 in human beings due to depletion of ozone layer in ncsrt atmosphere? Answer: Explanation: Skin cancer is caused in human beings due to a depletion of ozone layer in the atmosphere. Some time back, Kulhadas, that is disposable cups made up of clay, were suggested as an alternative.
Why V hull fishing boat for sale 40 are not being used in trains now? Answer: Explanation: Manufacturing Kulhads on large scale would result in the depletion of fertile top soil making the land inadequate for the cultivation of crops.
Those waste materials which can be broken down to non-poisonous susbtances in nature in due course of time by the action of micro-organisms are called ��. The waste materials which can not be broken down into harmless substances in nature are called ��. In ��. Ozone at the higher levels of atmosphere is a product of UV radiation acting on ��.
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