A control group of the experiment is the one in which no treatment or intervention is given. So, in your case, the pea plants in which was not subjected any of the fertilizers, will serve as a control group. This is a negative control. A positive control group is the one in which an established treatment is given, which definitely leads to the production of the desired character. So, in your case, a very good well-known fertilizer which has a positive control on the growth of the pea plant, would serve as a positive control.
Dalton's theory of atoms are invisible was later proven false. An atom can be further divided into protons, neutrons, and electrons.
Hope this helps!
It is D. <span>Packets of stored energy are converted to chemical energy in glucose.</span>
