The table below shows the concentration of some ions in pond water and in the cell sap of some aquatic plant growing in the pond
IMG_2
(a) With a reason name the process by which each of the following ions could have been taken up by this plant
i) Sodium
Reason
ii) Potassium
Reason
(b)
i) Which ion would cease to be absorbed if the plant was treated with a metabolic poison?
ii) Give a reason for your answer
0
(0 Ratings)
(a) i) Diffusion; movement of solute molecules from high concentration to low concentration
ii) Active transport; movement of solute molecules from low concentration to high concentration / movement of solute molecules against a concentration gradient
(b)
i) Potassium ion
ii) Metabolic poison stops respiration/energy production which is needed for active absorption of potassium ions
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Identify radiation B and provide an explanation for the differing deviations observed in the paths of radiations A and C as they pass through an electric field, as depicted in figure 15.
Determine the frequency of X-rays produced in an X-ray tube with a 12000V acceleration voltage, assuming full energy conversion, using Planck's constant and the charge of an electron.
Name the components labeled A and B in the X-ray tube, explain how altering the potential across P affects X-ray intensity, and describe the cause of the high temperature in the tube during operation.
