Which one of the following is being tried in India as a biofuel substitute for fossil fuels
Jatropha
Azadirachta
Musa
Musa
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.
The Indian rhinoceros is a natural inhabitant of which one of the Indian states?
Uttarakhand
Uttar Pradesh
Himachal Pradesh
Himachal Pradesh
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
Phytoplankton
Fish
Zoonplankton
Zoonplankton
Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D.
|
A |
B |
C |
D |
|
Nitrification |
Ammonification |
Animals |
plants |
|
A |
B |
C |
D |
|
Dentirificiation |
Ammonification |
Plants |
Animals |
|
A |
B |
C |
D |
|
Nitrification |
Denitrification |
Animals |
Plants |
|
A |
B |
C |
D |
|
Nitrification |
Denitrification |
Animals |
Plants |
DDT residues are rapidly passed through food chain causing biomagnification because DDT is
liposoluble
moderately toxic
non-toxic to aquatic animals
non-toxic to aquatic animals
