Krisopa, lady birds, beetles are the examples of
A) Crop destroyers
B) Friendly insects
C) Crop enemies
D) Insecticides
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Water `rarr` zooplankton `rarr` small fish `rarr` large fish `rarr` fish eating birds In the above food chain If concentration of DDT is 0.003ppb the
Correct Answer - `{:(" Water"),((.003 ppb)),(" "darr),(" "zp),((".004 ppm")),(" "darr),(" sf"),((.5 "ppm")),(" "darr),("LF (2-5 ppm)"),(" "darr),("Birds (25 ppm)"):}`
2 Answers 1 views
This man observed birds in flight, and designed a flying machine.
B) Leonardo da Vinci
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This man observed birds in flight, and designed a flying machine.
2 Answers
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In a survey of 200 ladies , it was found that 142 like coffee , while 58 dislike it . Find the probility that a lady chosen at random (i) likes coffee
Correct Answer - (i) 0.71 (ii) 0.29
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The scales of fishes, reptiles and feathers of birds grow from which cells ?
A) Epithelial cells
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Darwin observed the variations in Finch birds ……………
D) Galapagos Islands
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Finch birds are found in ……. island.
(C) Galapagos
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Reason for dying of red colour beetles and increase of green coloured beetles ……….
(C) Variation in the colour
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Kolleru lake attracts migrating birds from Asia and Eastern Europe of about ………. birds per year.
(B) 20,00,000 birds
2 Answers 2 views
Larvage of beetles are known as
Correct Answer - B Birds have bipedal locomotion because fore limbs are modified into wings.
2 Answers 1 views