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Ecosystem

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

Previous Year Papers

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Class 10 Class 12

Which one of the following is being tried in India as a biofuel substitute for fossil fuels

  • Jatropha

  • Azadirachta

  • Musa

  • Aegilops


A.

Jatropha

Biofuels are substances of biological origin which are used for the production of heat and another form of energy. Often biologically generated hydrogen, methane, ethanol, butanol and diesel are referred to as biohydrogen, biomethane, bioethanol, biobutanol and biodiesel respectively. Petro plans are the plants which can yield a large amount of latex having long chained liquid hydrocarbon, eg, Jatropha, Euphorbia (family-Euphorbiaceae) and other members of Euphorbiaceae, Asclepiadaceae, Apocyanaceae. 

The wood used as a source of energy is called fuel wood. The good fuelwood should be free from resin, much smoke and offensive odours. Hardwood is generally good fuel wood, Casuarina, Azadirachta, Dalbergia, Terminalia.

Biofuels are substances of biological origin which are used for the production of heat and another form of energy. Often biologically generated hydrogen, methane, ethanol, butanol and diesel are referred to as biohydrogen, biomethane, bioethanol, biobutanol and biodiesel respectively. Petro plans are the plants which can yield a large amount of latex having long chained liquid hydrocarbon, eg, Jatropha, Euphorbia (family-Euphorbiaceae) and other members of Euphorbiaceae, Asclepiadaceae, Apocyanaceae. 

The wood used as a source of energy is called fuel wood. The good fuelwood should be free from resin, much smoke and offensive odours. Hardwood is generally good fuel wood, Casuarina, Azadirachta, Dalbergia, Terminalia.

324 Views . 6 Shares

The animals that feed on plants are called :
  • Producers 
  • Carnivores
  • Insectivores
  • Herbivores

D.

Herbivores
1246 Views . 11 Shares

Cockroaches can feed both on plant and animal food, they are called :
  • Herbivores
  • Carnivores
  • Omnivores
  • None of the above

C.

Omnivores
1073 Views . 9 Shares

The green plants in the ecosystem-terminology are called :
  • Producers
  • Consumers
  • Herbivores
  • Carnivores

A.

Producers
1951 Views . 7 Shares

What trophic level is occupied by the birds in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

C.

Third
972 Views . 11 Shares

What trophic level is occupied by the Phytoplankton in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

A.

First
826 Views . 8 Shares

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