Answer is D. hope this helps
Answer:
I'm not too sure but I think it's the need for medical plants
I would have chosen the need for oil, but I can't think of the way oil affects plants
It would belong to the Alkaline class
Neurons produce an action potential at the same time or none at all
Answer:
Experimental groups: type of dogs
Dependent variable: hearth rate
Independent variable: the amount of caffeine
Explanation:
The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.
