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
A.
Fragmentation - Carried out by organisms such as earthworm
Fragmentation is one of the steps during decomposition, in which detritus is converted into small fragments. Humification leads to a dark coloured amorphous substance called humus that is highly resistent to microbial action and undergoes decomposition at an extremely slow rate.
Catabolism is the set of metabolic pathways that breaks down metabolic pathways that break down molecules into smaller units to release energy. Leaching refers to the loss of water-soluble plant nutrients from the soil due to rain and irrigation
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
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
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
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 |
