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In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.

In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.
Biology522012449815522.jpg
The temperature reading were taken every morning for three consecutive days
(a) Which process was being investigated?
(b) Why were the seeds disinfected?
(c) Why was a vacuum flask used in the set-up?
(d) How would a control for this experiment be set?

Answers

John
a) Respiration or aerobic respiration

b) To kill bacteria/ fungi/ micro-organisms that would cause decay/ decomposition or respiration of the micro-organisms which could raise heat

c) To conserve heat/ prevent heat loss to surrounding

d) Use a similar set-up with dead disinfected boiled seeds or use dry bean seeds
johnmulu answered the question on May 4, 2017 at 11:58

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