Biology - Questions (Section-1)
73Mutation is
A. a factor responsible for plant growthB. a change which affects the offspring of F2 generation only
C. a change that is inherited D. a change which affects the parents
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74Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
A. By cyanobacteriaB. By electrical discharges in the atmosphere
C. By industrially synthesised fertilizer D. By denitrification
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75Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
A. hormonesB. enzymes
C. proteins D. vitamins
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76Pollen grains in plants are produced in
A. rootsB. leaves
C. flower D. stem
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77Pollination by wind is called
A. anemophilyB. hydrophily
C. zoophily D. entomophily
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78Ptyalin is an enzyme produced in the
A. salivary glandsB. pituitary glands
C. thyroid glands D. pancreas
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