The roots typically deliver water and nutrients to the plants. They are a transport system that provide necessary elements for growth.
Answer:
You would have to change your hypothesis.
Explanation:
Experiments can always go "wrong", but they are important because they provide evidence that maybe is not the fertilizer the variable that is influencing plant growth. After this you could change the experiment taking into account new variables such as pH, amount of water or sunlight etc.
there rate of reproutuction is very fast
The correct answer is the lungs. Usually, in the systemic organs such as the liver, kidneys, and the heart; hypoxia or low oxygen levels cause the blood vessels supplying them to vasodilate to increase flow of blood and prevent ischemia. Adequate oxygenation of systemic organs cause the blood supply to vasoconstrict to prevent pooling of oxygenated blood and shunt it to other organs that need the oxygen more.
However, in the lungs, the opposite is true because in the setting of hypoxia, the blood vessels of the lungs vasoconstrict as to shunt the blood to other parts of the lungs with adequate oxygenation for the blood to be adequately oxygenated. If there is adequate oxygen in the lungs, then blood vessels vasodilate to efficiently get the oxygen from the lungs.
