In the two leaves experiment to prove how our stomach walls are protected, we use
grease or petroleum jelly and weak acid. With which parts of the body do we compare
these materials.
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1) Take two similar green leaves. 2) Grease one leaf with petroleum jelly, leave the other free. 3) Add 1 or 2 drops of some weak acids on both the leaves. ... From the above activity we can conclude that mucus secreted by the walls of stomach protect it from the harmful effects of hydrochloric acid.
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these question is in narayana 10 th class prefinal 2021 biology 18 th question na
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