Advertisements
Advertisements
Question
In order to study and prove a particular physiological process in plants, the following experiment was set up. Study the same and then answer the question that follow:

If bottle 'C' was fitted with a 3-holed rubber stopper and a thermometer was introduced in such a way that its bulb reaches close to the germinating seeds, what would you observe? Why?
Advertisements
Solution
By introducing a thermometer in bottle 'C', the change in temperature is checked or observed. If respiration takes place, there will be a rise in temperature and if there is no rise in temperature, no respiration occurs. Therefore, a three-holed rubber stopper and a thermometer were introduced.
APPEARS IN
RELATED QUESTIONS
Describe one experiment you would perform to demonstrate the following phenomena: The germinating seeds produce heat.
The following diagram refers to an apparatus which is used to demonstrate a physiological process:

Why has the coloured water risen in tubing 1?
Given below is a set of six experimental set-ups (A-F), kept in this state for about 24 hours.

What is the purpose of the set-up F?
Given below is a set of six experimental set-ups (A-F), kept in this state for about 24 hours.

What conclusion can you draw from this experiment?
In order to study and prove a particular physiological process in plants, the following experiment was set up. Study the same and then answer the question that follows:

What is the function of soda lime in the bottle 'A' and why is limewater placed in bottle 'B'?
In order to study and prove a particular physiological process in plants, the following experiment was set up. Study the same and then answer the question that follow:

What change would you expect to observe in bottle 'D'?
In order to study and prove a particular physiological process in plants, the following experiment was set up. Study the same and then answer the question that follow:

In order to obtain accurate results, the bottle 'C' should be covered with black cloth. Why?
Given alongside is an experimental set up to demonstrate a phenomenon in a plant:
(a) What is the aim of this experiment?
(b) Why was the bell jar covered with a black cloth?
(c) What is the function of caustic soda in this experiment?
(d) Give an overall chemical equation of the process mentioned in (a) above.
(e) Mention one precaution that should be taken to ensure more accurate results. What change, if any, would you observe in the lime water in Flask A and B? In each case give a reason for your answer.

Name the following:
The chemicals generally used to absorb carbon dioxide in respiratory experiments.
Name the following:
The solution that turns milky when carbon dioxide is passed through that solution.
