B) The researcher placed two small paper discs onto the surface of the jelly. One disc had been soaked in spot-lotion. The other disc had been soaked in water. The diagrams below show
the jelly at the beginning of the experiment, and two days later,
paper disc soaked
in spot-lotion
clear area
surface covered
with bacteria
paper disc
soaked in water
at the beginning of the experiment
two days later
Suggest what had happened to the bacteria in the clear area around the paper disc soaked
in spot-lotion.
(1 mark)

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

What are levels of ecology and how can we remember them

The sea slug that considered to be a photosyntheesizing animal