Q71
African sleeping sickness is due to
Correct Answer
Option C
Solution
(c) African sleeping sickness is caused by Trypanosoma gambiense transmitted by Tse-Tse fly.
Biological Classification
Q72
Which one of the following organisms is not an example of eukaryotic cells?
Correct Answer
Option B
Solution
(b) E. coli is a prokaryotic gram negative bacterium.
Q73
The thalloid body of a slime mould (Myxomycetes) is known as
Correct Answer
Option A
Solution
(a) The thalloid body of slime moulds is a multinucleated single celled mass called plasmodium.
Q74
In Amoeba and Paramecium osmoregulation occurs through
Correct Answer
Option C
Solution
(c) Contractile vacuole in Amoeba and Paramecium maintains the water balance of the cell.
Q75
Which one of the following is a slime mould?
Correct Answer
Option A
Solution
(a) Physarum polycephalum is a slime mold.
Q76
Name the organisms which do not derive energy directly or indirectly from sun
Correct Answer
Option A
Solution
(a) Chemosynthetic bacteria obtain energy from oxidation of inorganic substances, not sunlight.
Q77
In which group of organisms the cell walls form two thin overlapping shells which fit together?
Correct Answer
Option D
Solution
(d) In chrysophytes, the cell walls form two thin overlapping shells. Diatoms appear like soap box.
Q78
Which of the following organisms are known as chief producers in the oceans?
Correct Answer
Option B
Solution
(b) Diatoms are the chief producers in some oceans.
Q79
Which one belongs to monera?
Correct Answer
Option B
Solution
(b) Escherichia is bacteria, belonging to Kingdom Monera.
Q80
Entamoeba coli causes
Correct Answer
Option D
Solution
(d) Entamoeba coli is a non-pathogenic species. Dysentery is caused by Entamoeba histolytica.
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