Question

Auxanometer is meant for

• A. Photosynthetic activity
• B. Growth activity
• C. The amount of auxins
• D. Respiratory activity

Answer 1

Answer: (B)

Growth activity

An auxanometer (Gr. 'Auxin' means to grow) and 'Meteron' (means to measure).

Arc-auxanometer have a wire fixed with the plant apex on one and dead-weight on the other end. The height of the plant increases, the pulley will rotate and moves on the circular scale directly give the magnitude of the plant's growth.

Sensitive auxanometer allows the measurements of growth as small as the micrometer measures the growth in response to short-term changes in the atmospheric composition.

So, the correct option is'Growth activity'.