Question

Clinostat is used in the study for
A. Photosynthesis
B. Respiration
C. Geotropism
D. Osmosis

Answer 1

Hint: Clinostat is a valuable tool that can be used to study processes that are related to a type of non-contact force. This force is attractive and was first described by Newton.

Complete answer
Clinostat is used for the study regarding the effect of geotropism on plant growth. In experimentation, it is used to cancel the effects of gravitational force by normalizing the effect of gravity vectors on a plant by constant rotation around an axis that is perpendicular to the gravitational force.

Additional Information:
Several other devices are used to measure the growth in plants:
- Arc Auxanometer: It is composed of several parts, it is composed of a pulley connected to a pointer present on an arch scale over a vertical scale,
- Pfeffer’s automatic auxanometer: It has a vertical stand that holds two pulleys. To one pulley is attached a thread carrying two weights at two ends which keep the thread stretched. One of the sides of the pulley is also attached to a pointer which is kept in such a way that it touches a smoked drum which helps in recording the growth.
- Bose’s Crescograph: Highly sensitive apparatus based on the system of compound levels.
- Space marker disc: It is used to measure the area of leaf and markings are done at regular intervals of time and the growth rates can be measured.
- Measurement of dry weight can also be done to measure growth.

So, the correct answer is, “Clinostat is used in the study for geotropism.”

Note:
Several factors affect the growth of plants. These factors include food supply, water supply, oxygen supply, temperature, light, carbohydrate and nucleus ration, genotype or genetic factor, and plant growth regulator. The growth rate depends on the light intensity, light quality, gravitational force, and duration of light.