In the primitive atmosphere which was not available in free state?
Options
(a) CH₄ (b) H₂ (c) O₂ (d) H₂O
Correct Answer:
O₂
Explanation:
The early atmosphere was without free oxygen, so atmosphere was […]
Institute of paleobotany is situated at
Options
(a) Delhi (b) Allahabad (c) Lucknow (d) Aurangabad
Correct Answer:
Lucknow
Explanation:
The institute of Paleobotany is situated at Lucknow. The name of this institute is due […]
Organic evolution is
Options
(a) continuous process (b) discontinuous process (c) initially discontinuous, now continuous (d) initially continuous, now discontinuous
Correct Answer:
continuous process
Explanation:
No explanation available. Be the first to write […]
The pollutants released by jet planes are
Options
(a) fogs (b) smogs (c) colloides (d) aerosols
Correct Answer:
aerosols
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen, approximately by
Options
(a) 2 times (b) 200 times (c) 20 times (d) 1000 times
Correct […]
Which of the following sets of cell organelles contains DNA?
Options
(a) nucleus,ribosomes and chloroplasts (b) nucleus,ribosomes and mitochondria (c) nucleus, mitochondria and chloroplasts (d) mitochondria,ribosomes and chloroplasts
Correct Answer:
nucleus, mitochondria and […]
C₄ plants have an advantage over C₃ plants when the weather is
Options
(a) only hot (b) hot and dry (c) hot and wet (d) cold and dry
Correct Answer:
hot and dry
Broca’s area in human brain controls
Options
(a) Movement of tongue (b) breathing and hiccup (c) Movement of vocal chords (d) Movement of tongue & breathing and hiccup
Correct Answer:
Movement of tongue […]
Emasculation is achieved by the removal of
Options
(a) entire gynoecium (b) stigma (c) anthers (d) petals and sepals
Correct Answer:
anthers
Explanation:
No explanation available. Be the first to write the explanation […]
2,4-D is an effective
Options
(a) fungicide (b) rodenticide (c) weedicide (d) wormicide
Correct Answer:
weedicide
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting […]
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