Question

Crescograph and auxanometer are

• A. Used to study the effect of sunlight on plants
• B. Used to grow plants in a controlled environment
• C. Growth-measuring instruments
• D. Instruments to study the age of tree

Answer 1

The correct option is C

Growth-measuring instruments

Growth is measured by measuring an increase in length, volume, area, diameter etc.

A crescograph is a device to measure the growth in plants which showed how the rate of growth varies under varying stimuli.

So, an auxanometer is used to measure the growth in length of a plant organ.