Answer:
Phototropism is one of the many plant tropisms or movements which respond to external stimuli. Growth towards a light source is called positive phototropism, while growth away from light is called negative phototropism (skototropism).
Explanation:
The epithelium tissue which permits gas exchange across the air sacs in the lungs are the simple squamos. It is a layer of flat cells that is in connected with the basal lamina. This part allows molecules that are small to pass by diffusion or filtration.
Answer:
They are necessary because, in fresh water, the concentration of solutes inside a cell is greater than that outside the cell, so the cell constantly absorbs water through osmosis
Explanation:
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Answer: Hemoglobin
Explanation: Hemoglobin is a protein very rich in iron found in red blood cells and is responsible for the transportation of Oxygen from the lungs to the whole body. Oxygen binds to the hemoglobin in red blood cells and the red pigmentation of blood that is highly oxygenated is due to the hemoglobin content found in RBC's.
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