Answer: B. Rough strained and heat killed smooth strain kills mouse
Explanation:
A control variable is a scientific experiment in which the experimental element is unchanged throughout the experiment
a control group is a group in an experiment that does not receive the treatment by the researchers (untouched by them) and used to see the changes between the controlled group and that of the group that received the vial
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ATP in biology stands for Adenosine triphosphate. It’s an energy carrying molecule found in the cells of all living things. It captures the chemical energy obtained from the breakdown of food molecules and then it releases it to other cellular processes
