B, proton is positive and it does not represent the symbol
Answer:
interaction between two different organisms living in close physical association, typically to the advantage of both.Compare with antibiosis.
a mutually beneficial relationship between different people or groups.
Explanation:
Answer:
No, it has too many variables or possible changes.
Explanation:
If you carried out an experiment or research on something, you have to given the same environmental and soil conditions to the factors. In this experiment, Kevin put the first plant in large pot and the other two plants in the field conditions. For performing correct experiments, Kevin put all the plants in separate pots or in the field conditions.