During  sewage treatment, biogas are produced, which include

• methane, hydrogen sulphide and carbon dioxide

• methane, oxygen and hydrogen sulphide

• hydrogen sulphide, methane and sulphur dioxide

• hydrogen sulphide, methane and sulphur dioxide

In the plant breeding programmes, the entire collection (of plants/ seeds) having all the diverse alleles for all genes a given crop is called

• selection of superior recombinants

• cross - hybridisation among the selected parents

• evaluation and selection of parents

• evaluation and selection of parents

Which one of the following processes during decomposition is correctly described? 

• Fragmentation - Carried out by organisms such as earthworm

• Humification - Leads to the accumulation of a dark coloured substance humus, which undergoes microbial action at a very fast rate

• Catabolism - Last step in the decomposition under fully anaerobic condition

• Catabolism - Last step in the decomposition under fully anaerobic condition

Global warming can be controlled by

• Reducing deforestation, cutting down use of fossil fuel

• Reducing reforestation, increasing the use of fossil fuel

• Increasing deforestation, slowing down the growth of human population

• Increasing deforestation, slowing down the growth of human population

The air prevention and control of pollution Act came into force in

• 1975

• 1981

• 1985

• 1985

Which of the following represent a maximum number of species among global biodiversity?

• Algae

• Lichens

• Fungi

• Fungi

Match the name of the animal (Column I ) with one characteristic (Column II) and the phylum/class (Column III ) to which it belongs

• 	Column I	Column II	Column III
  a	Petromyzon	Ectoparasite	Cyclostomata

• 	Column I	Column II	Column III
  b	Lchthyophis	Terrestrial	Reptilla

• 	Column I	Column II	Column III
  c	Limulus	Body covered by chitinous exoskeleton	Pisces

• 	Column I	Column II	Column III
  c	Limulus	Body covered by chitinous exoskeleton	Pisces