In piped water supply system, water is often treated with chlorine to
Options
(a) remove hardness (b) kill germs (c) increase oxygen level (d) remove algae
Correct Answer:
kill germs
Explanation:
No explanation […]
Which of the following is the source of energy for muscle contraction?
Options
(a) actin (b) actomyosin (c) myosin (d) ATP
Correct Answer:
ATP
Explanation:
No explanation available. Be the first to write […]
Gibberellins can promote seed germination because of their influence on
Options
(a) rate of cell division (b) production of hydrolyzing enzymes (c) synthesis of abscisic acid (d) absorption of water through hard seed […]
Structure found in blue green algae which helps in nitrogen fixation is
Options
(a) Heterocyst (b) Holotrema (c) Haplosperm (d) Holosteum
Correct Answer:
Heterocyst
Explanation:
No explanation available. Be the first to write […]
Which part of the leaf is meant for photosynthesis and gaseous exchange?
Options
(a) bundle sheath with chloroplasts (b) bundle sheath extensions (c) palisade parenchyma (d) spongy parenchyma
Correct Answer:
spongy parenchyma
Explanation: […]
A good example of organic fertilizer which improves phosphorus uptake is
Options
(a) actinomycetes fungi (b) Rhizobium (c) Azospirillum (d) none of these
Correct Answer:
none of these
Explanation:
No explanation available. Be […]
Then process of the escape of liquid from tip of uninjured leaf is called
Options
(a) guttation (b) transpiration (c) evaporation (d) evapo-transpiration
Correct Answer:
guttation
Explanation:
No explanation available. Be the first […]
Automobile exhaust causes respiratory problems because of the presence of
Options
(a) CO (b) CH₄ (c) chlorine (d) NO₂
Correct Answer:
CO
Explanation:
No explanation available. Be the first to write the explanation […]
Which of the following gene is responsible for biological nitrogen fixation
Options
(a) nitrogenase (b) Nif gene (c) yeast alanine t-RNA synthetase (d) RNA synthetase
Correct Answer:
Nif gene
Explanation:
No explanation available. […]
Photochemical smog formed in congested metropolitan cities mainly consists of
Options
(a) ozone, peroxyacetyl nitrate and NOₓ (b) smoke, peroxyacetyl nitrate and SO₂ (c) hydrocarbons, SO₂ and CO₂ (d) hydrocarbons, ozone and SOₓ
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