Is any member of a large class of gaseous, liquid, or solid chemical compounds<span>whose molecules contain carbon</span>
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As a control for the sasquatch experiment, a fake deer is placed in the forest. The role of this control in experiment is to provide a basis of comparison to the experimental group.
Scientists often analyze hypotheses developed by them by means of controlled experiments. A controlled experiment is a scientific test performed under controlled conditions, denoting that only one or a few variables are altered at a time whereas, all the remaining variables are kept constant.
Controls are utilized in an experiment to reduce the effects of variables besides the one being tested. An experimental group is also sometimes referred to as a treatment group, which receives a treatment in an experiment.
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Answer:
The monocyclic pathogen follows the black arrows to complete its cycle. Polycyclic pathogens follow the red arrows for the majority of the season and the black arrows at the end of the season. In order for a disease to develop, a pathogen must be present and successfully invade plant host tissues and cells.
Explanation:
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