Question

Question 4
(a) Study the experimental set up given below and answer the following questions:
Thermometer
Wet cottonwool
Dead seeds
Germinating
seeds
(i) What is the aim of the experiment shown above?
(i) What is your observation after a few hours for flask 'A' and 'B'?
(iii) Name the chemical used to prevent bacterial growth.
Explain how the bacteria would interfere with the experiment.
(iv) Why do we use thermos flasks specifically for the experiment?
(v) Which is the control set-up and why?​

Answer 1

Answer:

(i) heat is evolved during respiration

(ii) after few hours flask will show higher reading indicating germinating seeds give out heat

(iii) carbolic acid

(iv) maybe to use as insulater

(v) flask B is used as control set-up