Good evening Aixa,
An experiment is designed so that you can observe the differences between the experimental group and the control group.
The experimental group is the group of specimens you're exposing to the experiment and the control group is a separate group of specimens that is not being exposed to the experiment, but are also being observed.
-Hope this helps!
bacteria in food can be killed by many means such as:
a) Pickling. for example food is pickled as bacteria cannot live in very acidic conditions.
b) Boiling. boiling water or liquids can help kill bacteria present in them.
c) Using preservatives can also help
d) Immersing food in salt or sugar solutions is also an other way
b. They show the body virus pieces to prepare it to fight that virus in the future.
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the answer is A
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i took this test and i got 100% on it so trust me
