1.

The instrument by which the rate of growth of stem is accurately measured is Or Growith in langth of a plant can be measured byA. HydrometerB. AuxanmeterC. OsmometerD. Potometer

Answer» Correct Answer - b
( b) Auxanometer can register total growth, rate of growth at specific time and overall pattern of growth. In arc auxometer actual growth in length of a plant is measured as
Actual growth=`(" distance travelled by pointer"xx" radius of pulley")/("Length of pointer from centre of pulley")`


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