D. Biology. In forensics, they use DNA-related evidence, and DNA relates to biology.
a control helps to increase the reliability of the results. it allows a scientist to compare it to other group(s) in an experiment. if a scientist notices a significant different btwn the control and the other groups, he can logically conclude that the independent variable has an impact on the dependent variable.
a variable is any factor, trait or condition that can exist in differing amounts or types. there are usually three tpes of variables in experiments: the independent, dependent and contolled. the independent variable variable is the one that is changed by the scientists to figure it's affect on something.
Biotic factors may include things like:
-predation
-disease
<span>-competition
</span>-parasitism
<span>-consumption
and -symbiosis
Hope this helps then!! :)
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Babies, especially those who are at least 4-6 months old, have the tendency to explore objects by touching and holding them, and putting them in their mouth. By this time, it is very important to keep small objects out of their reach so that accidents can be prevented.
The data has to be verifiable by the scientific community.
