Which one of the following is vestigial organ in human beings
Options
(a) nictitating membrane (b) spleen (c) femur (d) tibia
Correct Answer:
nictitating membrane
Explanation:
No explanation available. Be the first to […]
Who coined the term ‘Homo sapiens’?
Options
(a) Charles Darwin (b) Lamarck (c) Carolus Linnaeus (d) Lederberg
Correct Answer:
Carolus Linnaeus
Explanation:
No explanation available. Be the first to write the explanation for […]
Wings of birds and forelimbs of horse are ___ organs
Options
(a) analogous (b) homologus (c) vestigial (d) none of these
Correct Answer:
homologus
Explanation:
No explanation available. Be the first to write […]
In Minamata Bay Japan, the animals which remained free from Minamata disease, are
Options
(a) pigs (b) dogs (c) rabbits (d) cats
Correct Answer:
rabbits
Explanation:
Minamata disease is caused because of eating […]
Maximum ozone depletion is caused by
Options
(a) CO₂ (b) SO₂ (c) CFC (d) CH₄
Correct Answer:
CFC
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Minamata disease first occurred in
Options
(a) Japan (b) China (c) Korea (d) Russia
Correct Answer:
Japan
Explanation:
Mercury (mercuric chloride) enters into water naturally as well as through industrial effluents. It was […]
Nuclear reactor malfunction in any country is a cause of concern for
Options
(a) the reactor’s employees and neighbours (b) the entire human population (c) some enlightened persons world-wide (d) some developed and […]
Oxides of nitrogen combine to form
Options
(a) photochemical smog (b) ozone (c) smoke (d) particulate matter
Correct Answer:
photochemical smog
Explanation:
Photochemical smog is grey or yellow brown opaque smog having oxidising […]
Ozone prevents the entry of
Options
(a) infrared rays (b) visible rays (c) UV rays (d) X-rays
Correct Answer:
UV rays
Explanation:
Ozone layer or shield is present in stratosphere which is also […]
Ozons (O₃) layer in stratosphere is effected by
Options
(a) CFC (b) excess of CO (c) excess of CO₂ (d) low rainfall
Correct Answer:
CFC
Explanation:
No explanation available. Be the first to […]
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