You subtract the number of protons and the mass to get the number of neutrons.
Lactobacillus<span> is a genus of Gram-positive, facultative anaerobic or microaerophilic, rod-shaped, non-sporeforming bacteria. They are a major part of the lactic acid bacteria group (example: they convert sugars to lactic acid).</span>
The independent variable is what will change. The dependent variable is what will change because of the independent variable. The controlled variable is what will stay the same.
Ex, for the first one.
IV: the amount of sunlight
DV: plant growth
CV: pea plant
For #2.
IV: the soda
DV: the amount of sugar
CV: soda
And so on
Pretty sure the answer is A
