101: H1N1 virus is sometimes mentioned in the news with reference to which one of the following diseases?
(a) AIDS
(b) Bird flu
(c) Dengue
(d) Swine flu
Explanation:
Swine flu (H1N1 and H3N2v influenza virus) facts. Swine flu is a respiratory disease caused by influenza viruses that infect the respiratory tract of pigs and result in a barking cough, decreased appetite, nasal secretions, and listless behavior; the virus can be transmitted to humans.
102: Consider the following organisations :
I. Atomic Minerals Directorate for Research and Exploration
II. Heavy Water Board
III. Indian Rare Earths Limited
IV. Uranium Corporation of India
Which of these is/are under the Department of Atomic Energy ?
(a) I only
(b) I and IV
(c) II, III and IV
(d) I, II, III and IV
103: Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the
(a) seeds have very high oil content
(b) oil is rich in unsaturated fatty acids
(c) oil has long shelf-life
(d) oil has very low Erucic acid content
Explanation:
'Canola' are a special type of oil seed mustard varieties bred for oil rich in unsaturated fatty acids.
104: With reference to bio-toilets used by the Indian Railways, consider the following statements:
1.The decomposition of human waste in the bio-toilets is initiated by a fungal inoculum.
2. Ammonia and water vapour are the only end products in this decomposition which are released into the atmosphere.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Explanation:
The bio-toilets, which have been developed by the railways and the Defence Research & Development Organisation (DRDO), have a colony of anaerobic bacteria, kept in a container under the lavatories that convert human waste into water and small amounts of gases. The gases are released into the atmosphere and the water is discharged after chlorination on to the track.
Hence answer is D
105: Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
(a) Keystone species
(b) Allopatric species
(c) Sympatric species
(d) Threatened species
Explanation:
Keystone species are important in determining the ability of a large number of other species to persist in the community.
Allopatric species : different species that live in the same area but are prevented from successfully reproducing by a reproductive isolating mechanism.
Threatened species : May become endangered species in the near future, proper protection measures were not taken up.