Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of :
Options
(a) light (b) essential minerals (c) oxygen (d) food
Correct Answer:
oxygen
Explanation:
Due to eutrophication water […]
Acid rain is caused by increase in the atmospheric concentration of:
Options
(a) SO3 and CO (b) CO2 and CO (c) O3 and dust (d) SO2 and NO2
Correct Answer:
SO2 and NO2
Explanation: […]
A scrubber in the exhaust of a chemical industrial plant removes:
Options
(a) Gases like sulphur dioxide (b) Particulate matter of the size 5 micrometer or above (c) Gases like ozone and methane (d) […]
A location with luxuriant growth of lichens on the trees indicates that the :
Options
(a) Trees are very healthy (b) Trees are heavily infested (c) Location is highly polluted (d) Location is not […]
Which of the following enhances or induces fusion of protoplasts ?
Options
(a) Polyethylene glycol and sodium nitrate (b) IAA and kinetin (c) IAA and gibberellins (d) Sodium chloride and potassium chloride
Correct […]
Outbreeding is an important strategy of animal husbandry because it :
Options
(a) is useful in producing purelines of animals (b) is useful inovercoming inbreeding depression (c) exposes harmful recessive genes that are […]
A technique of micropropagation is :
Options
(a) Somatic embryogenesis (b) Protoplast fusion (c) Embryo rescue (d) Somatic hybridization
Correct Answer:
Somatic embryogenesis
Explanation:
Development of embryo like structure from explant by the method […]
Which one one of the following matches is correct?
Options
(a) Alternaria-Sexual reproduction absent-Deuteromycetes (b) Mucor-Reproduction by Conjugation-Ascomycetes (c) Agaricus-Parasitic fungus-Basidiomycetes (d) Phytophthora-Aseptate mycelium-Basidiomycetes
Correct Answer:
Alternaria-Sexual reproduction absent-Deuteromycetes
Explanation:
Alternaria belongs to class […]
Which one is wrong statement?
Options
(a) Mucor has biflagellate zoospores (b) Haploid endospermis typical feature of gymnosperms (c) Brown algae have chlorophyll a and c and fucoxanthin (d) Archegonia are found in Bryophyta,Pteridophyta […]
Which of the following are most suitable indicators of SO2 pollution in the environment?
Options
(a) Conifers (b) Algae (c) Fungi (d) Lichens
Correct Answer:
Lichens
Explanation:
Lichens cannot grow in the place […]
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