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.
Do you mean ion pumps in the membrane of cell?
If so, then ion pumps maintain an electrochemical gradient across the membrane.
Answer:
Weight stress
Explanation:
Analyzing FDA-regulated nutrition labels is a way to manage weight stress. It helps to improve your body:weight ratio.
These are called papillae
Diffusion is the passive transport from a high concentration to a low without using energy. homeostasis results from balance.
