Answer:
Control group remains unchanged.
Explanation:
For example if you are trying to see if watering plants with Pepsi is better.
Your experiment plant would get watered with Pepsi.
Your control plant would get watered with water. (Control groups serve as a reference to compare in the experiment)
Because it needs to be able to be proven and it avoids being incorrect.
Answer:
The pulmonary artery carries deoxygenated blood (blood whose oxygen content is relatively low) from the right ventricle to the lungs. The blood here passes through capillaries to alveoli and becomes oxygenated (as part of the process of respiration).
four support ing tissue in plants are
1. vascular tissue
2. epidermal tissue
3. ground tissue
4. meristematic tissue
They form in very bad storms or changing temps!