O D
Disc of the
same
antibiotic x
placed on
each plate
Method
Surface
covered with
bacterium A
Surface
covered with
bacterium B
Surface
covered with
bacterium C
Clear zone no
bacteria
•
Bacterial
Incubation at 37°C for 48 hours
growth
Result
[Adapted from 2004 HSC NSW: Section - Part B Q27)
The plates were incubated at 37°C for 48 hours. The diagram of plates 1, 2 and 3
in the bottom row show the results of the investigation.
2.1 Formulate a hypothesis for this investigation.​

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.