For generation of biogas, the materials commonly used are — (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues

For generation of biogas, the materials commonly used are — (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues
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(1) Animal wastes Explanation: Biogas typically refers to a gas produced by breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal feces, and kitchen waste can be converted into a gaseous fuel called biogas. Biogas originates from biogenic material and is a type of bio fuel. Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops.
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For generation of biogas, the materials commonly used are (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues

Description : For generation of biogas, the materials commonly used are (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues

Last Answer : Animal wastes

Biogas produced by the fermentation of animal dung, human sewage or crop residues in an airtight container is rich in?

Description : Biogas produced by the fermentation of animal dung, human sewage or crop residues in an airtight container is rich in?

Last Answer : Methane

Mushroom cultivation is not useful in (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Description : Mushroom cultivation is not useful in (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Last Answer : (2) Biological control of crop diseases Explanation: Mushroom cultivation has been found to coincide with decrease of incidents of breast cancer. Spent residues after cultivation could ... production; and agricultural waste recycling can be achieved through controlled cultivation of mushrooms.

Mushroom cultivation is not useful in – (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Description : Mushroom cultivation is not useful in – (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Last Answer : (2) Biological control of crop diseases

Mushroom cultivation is not useful in (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Description : Mushroom cultivation is not useful in (1) Biogas production (2) Biological control of crop diseases (3) Recycling of agricultural wastes (4) Preventing cancer

Last Answer : Biological control of crop diseases

DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Description : DDT residues are rapidly passed through food chain  causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Last Answer : (d) lipo soluble.

DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Description : DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Last Answer : (d) lipo soluble.

Select the correct statement from the following. (a) Biogas is produced by the activity of aerobic bacteria on animal waste. (b) Methanobacterium is an aerobic bacterium found in rumen of cattle. (c) Biogas, commonly called gobar gas, is pure methane. (d) Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Description : Select the correct statement from the following. (a) Biogas is produced by the activity of aerobic bacteria on animal waste. (b) Methanobacterium is an aerobic bacterium found in rumen of ... sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Last Answer : (d) Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Root nodules are commonly found in – (1) Parasitic plants (2) Epiphytic plants (3) Leguminous plants (4) Aquatic plants

Description : Root nodules are commonly found in – (1) Parasitic plants (2) Epiphytic plants (3) Leguminous plants (4) Aquatic plants

Last Answer : (3) Leguminous plants

Root nodules are commonly found in : (1) Parasitic plants (2) Epiphytic plants (3) Leguminous plants (4) Aquatic plants

Description : Root nodules are commonly found in : (1) Parasitic plants (2) Epiphytic plants (3) Leguminous plants (4) Aquatic plants

Last Answer : Leguminous plants

Composted manure is produced from(a) farmyard manure and green manure (b) farm refuse and household refuse (c) organic remains of biogas plants (d) rotten vegetables and animal refuse

Description : Composted manure is produced from(a) farmyard manure and green manure (b) farm refuse and household refuse (c) organic remains of biogas plants (d) rotten vegetables and animal refuse

Last Answer : (d) rotten vegetables and animal refuse

Composted manure is produced froma) Farmyard manure and green manure b) Farm refuse and household refuse c) Organic remains of biogas plants d) Rotten vegetables and animal refuse

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Benthic organisms are affected the most by (a) light reaching the forest floor (b) surface turbulence of water (c) sediment characteristics of aquatic ecosystems (d) water-holding capacity of soil

Description : Benthic organisms are affected the most by (a) light reaching the forest floor (b) surface turbulence of water (c) sediment characteristics of aquatic ecosystems (d) water-holding capacity of soil

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Which aquatic fern is used to increase the yield in paddy crop? (a) Azolla (b) Salvinia (c) Marsilea (d) Isoetes

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__________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc. (A) Flight (B) Screw (C) Drag (D) Belt

Description : __________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc. (A) Flight (B) Screw (C) Drag (D) Belt

Last Answer : (A) Flight

What are the methods of treatment & disposal of radioactive wastes? (A) Evaporation & chemical precipitation (B) Biological methods & adsorption in ion exchange materials (C) Fixing into a solid mass with cement and sinking deep in the sea (D) All (A), (B) & (C)

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“Biogas is a better fuel than burning animal dung cakes”. Justify

Description : “Biogas is a better fuel than burning animal dung cakes”. Justify

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Which one of the following is commonly used in transfer of foreign DNA into crop plants? (a) Meloidogyne incognita (b) Agrobacterium tumefaciens (c) Penicillium expansum (d) Trichoderma harzianum

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Last Answer : (b) Agrobacterium tumefaciens

Most commonly grown crop plants are included in (a) halophytes (b) Glycophytes (c) Sciophytes (d) Xerophytes

Description : Most commonly grown crop plants are included in (a) halophytes (b) Glycophytes (c) Sciophytes (d) Xerophytes

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What is biogas? Where in India are biogas plants set up and why? -SST 10th

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Last Answer : 1.Shrubs, farm waste, animal and human waste are used to produce biogas. 2.Biogas plants are set up at municipal, cooperative and individual levels. 3.These plants are set up in rural areas ... twin benefits to the farmer .They provide energy to the farmer, .Improved quality of manure is available.

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Last Answer : Blue whale, the world's largest aquatic animal

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Which is the National Aquatic Animal of India

Description : Which is the National Aquatic Animal of India

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Description : Is a crabeater seal an aquatic animal?

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Description : The aquatic animal with the most devel- oped intelligence?

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Biogas majorly contains - (1) Ethane (2) Methane (3) Hydrogen (4) CO

Description : Biogas majorly contains - (1) Ethane (2) Methane (3) Hydrogen (4) CO

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The biogas used for cooking is a mixture of which of the following? (1) Carbon dioxide and oxygen (2) Isobutane and propane (3) Methane and Carbon monoxide (4) Methane and carbon dioxide

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______ is a by product of sewage treatment and can be decomposed to produce biogas. (1) Sewage (2) Sludge (3) Sewer (4) Scum

Description : ______ is a by product of sewage treatment and can be decomposed to produce biogas. (1) Sewage (2) Sludge (3) Sewer (4) Scum

Last Answer : (2) Sludge Explanation: Sludge refers to the residual, semi-solid material that is produced as a byproduct during sewage treatment of industrial or municipal wastewater. It can be used to produce biogas through a process called anaerobic digestion or fermentation.

Biogas majorly contains? (1) Ethane (2) Methane (3) Hydrogen (4) CO

Description : Biogas majorly contains? (1) Ethane (2) Methane (3) Hydrogen (4) CO

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_________ is a by product of sewage treatment and can be decomposed to produce biogas (1) Sewage (2) Sludge (3) Sewer (4) Scum

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The biogas used for cooking is a mixture of which of the following ? (1) Carbon dioxide and oxygen (2) Isobutane and propane (3) Methane and carbon monoxide (4) Methane and carbon dioxide

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Last Answer :  Methane and carbon dioxide

The main constituent of biogas is (1) oxygen (2) methane (3) acetic acid (4) methyl alcohol

Description : The main constituent of biogas is (1) oxygen (2) methane (3) acetic acid (4) methyl alcohol

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Of the following commonly used materials, the one that is not an alloy is - (1) Steel (2) Brass (3) Bronze (4) Copper

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Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

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Last Answer : (2) Nickel and cadmium Explanation: A rechargeable battery, storage battery, or accumulator is a type of electrical battery. It comprises one or more electrochemical cells, and is a ... sizes, ranging from button cells to megawatt systems connected to stabilize an electrical distribution network.

Of the following commonly used materials, the one that is not an alloy is (1) Steel (2) Brass (3) Bronze (4) Copper

Description : Of the following commonly used materials, the one that is not an alloy is (1) Steel (2) Brass (3) Bronze (4) Copper

Last Answer : Copper

Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

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Biological Oxygen Demand (BOD) is a measure of: a. Industrial wastes poured into water bodies b. Extent to which water is polluted with organic compounds c. Amount of carbon monoxide inseparably combined with haemoglobin d. Amount of oxygen needed by green plants during night

Description : Biological Oxygen Demand (BOD) is a measure of: a. Industrial wastes poured into water bodies b. Extent to which water is polluted with organic compounds c. Amount of carbon monoxide inseparably combined with haemoglobin d. Amount of oxygen needed by green plants during night

Last Answer : Ans: A

What are methods of excretion of wastes in plants?

Description : What are methods of excretion of wastes in plants?

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Description : How do aquatic plants absorb oxygen ?

Last Answer : : There is oxygen in the corners of the flame , which it receives with the help of special receptors. Note: In most cases, oxygen is not absorbed because the perfume of oxygen released from one's body is recycled.

What is the difference between aquatic plants and desert plants ?

Description : What is the difference between aquatic plants and desert plants ?

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Which aquatic plants and terrestrial plants have more photosynthesis ?

Last Answer : In aquatic plants. Because water contains high levels of carbon dioxide, such as: .3%. And 0.03% in the atmosphere.

In aquatic environment, microscopic animals and plants are collectively known as

Description : In aquatic environment, microscopic animals and plants are collectively known as

Last Answer : In aquatic environment, microscopic animals and plants are collectively known as A. Commensals B. Herbivores C. Fauna and Flora D. Planktons

The subdivision of aquatic biome is based on salt content of water and the aquatic plants live there. 

Description : The subdivision of aquatic biome is based on salt content of water and the aquatic plants live there. 

Last Answer : Identify the correct correlation: A - The subdivision of aquatic biome is based on salt content of ... but R is not the correct explanation of A.

Blubber is - (1) a milky secretion of rubber plant (2) a layer of thick fat (3) a device to trap insects by some aquatic (4) fungal infection of rice plants

Description : Blubber is - (1) a milky secretion of rubber plant (2) a layer of thick fat (3) a device to trap insects by some aquatic (4) fungal infection of rice plants

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Arenchyma is present in – (1) Banana stem (2) Palm stem (3) Aquatic plants (4) Xerophytic plants

Description : Arenchyma is present in – (1) Banana stem (2) Palm stem (3) Aquatic plants (4) Xerophytic plants

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Give reason: In aquatic plants like lotus, the cuticle is thick.

Description : Give reason: In aquatic plants like lotus, the cuticle is thick.

Last Answer : In aquatic plants like lotus, the cuticle prevents decaying of tissues of leaves and other parts.

Aquaculture facilities cultivate approximately ____ different species of fish and shellfish and grow a variety of aquatic plants. a. 20 c. 10 b. 30 d. 40

Description : Aquaculture facilities cultivate approximately ____ different species of fish and shellfish and grow a variety of aquatic plants. a. 20 c. 10 b. 30 d. 40

Last Answer : b. 30

Name the sub-aerial stem modification seen in free floating aquatic plants. How does it help in vegetative propagation?

Description : Name the sub-aerial stem modification seen in free floating aquatic plants. How does it help in vegetative propagation? 

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