Phloem Surface Cells transport food/nutrients from the leaves to the roots.
Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
A. <span>The total amount of matter and energy remained the same, because energy can't be lost, it can only be transferred into a different sourceof energy.
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Hello!
The answer is hydrothermal solutions.
Hope this helps!
