Diagram 2 shows an experiment to study the effect of light on the growth of bacteria.
The condition of the nutrient broth in test tube P and Q is observed after three days.
The result of this experiment is recorded in Table 2.
(a) State one observation on the nutrient broth which has been kept in the black box for three days. [1 mark]
(b) State one inference for this experiment. [1 mark]
(c) State the variables in this experiment. [2 marks]
(i) Manipulated variable
(ii) Responding variable
(d) Based on this experiment, state the operational definition of bacteria. [1 mark]
(a) Condition of nutrient broth is cloudy.
(b) The bacteria grow actively in dark condition.
(c)(i) Presence of light
(c)(ii) Condition of nutrient broth
(d) Bacteria is a microorganism that caused the condition of nutrient broth turns cloudy.