Answer:
Transpiration
Explanation:
Transpiration is the loss of water vapour from the stems and leaves of plants.
The answer is D, the liver.
The correct answer is that the shells of clams and other mollusks dissolve when the pH becomes more acidic.
This is because the shells of clams and other mollusks are made of calcium carbonate that is dissolved in acidic conditions. The pH needs to be low to dissolve calcium carbonate into it. It takes few days to dissolve the shell completely.
60 years is three half life for the substance, so 40*1/2^3=5
