+10,000 Biology Questions, Tests and Polls
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+10,000 Biology Questions and Answers
Written and organized in a logical way to make the learning of basic Biology easier
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Gray spots of oat are caused by deficiency of
Anonymous Quiz
20%
Fe
38%
Zn
29%
Mn
13%
Cu
fertility of soil in rice fields can be improved by
Anonymous Quiz
44%
Blue green algae
14%
Sodium chloride
31%
Rhizobium
11%
Gypsum
Fall of immature leaf is due to deficiency of
Anonymous Quiz
11%
Sodium
36%
Phosphorous
16%
Sulphur
36%
Zinc
Exanthema is due to deficiency of
Anonymous Quiz
13%
B
38%
Mo
32%
Mn
17%
Cu
Little leaf is caused due to the deficiency of
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20%
Boron
21%
Copper
35%
Zinc
24%
Phosphorus
Chlorosis occurs when plants are grown in
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22%
Strong light
22%
Shade
30%
Dark
26%
Fe free medium
Element essential for photolysis of water is
Anonymous Quiz
17%
Carbon
44%
Oxygen
28%
Chlorine
11%
Nitrogen
carbon become available to crop plants in the form of
Anonymous Quiz
13%
Element carbon
32%
Carbonates
46%
Carbon dioxide
9%
Amino acids
In hydrophytic plants, water and salts are absorbed by
Anonymous Quiz
12%
Stem
16%
Leaves
48%
Roots
24%
Outer layer of plants
Conduction of inorganic materials in plants occur mainly through minerals absorbed by roots move to
the leaf through
Anonymous Quiz
14%
Sieve tube
28%
Phloem
50%
Xylem
8%
None of these
Non-legume nitrogen fixing organisms belongs to genus
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27%
Rhizobium
30%
Franken
20%
Clostridium
22%
Azotobacter
All heterotrophs require environment which can provide
Anonymous Quiz
10%
Ammonium salts
61%
Organic compounds
13%
Vitamin A
16%
Nitrates in solution