MCQs On Gaseous Exchange

Gaseous Exchange Multiple Choice Questions and Answers Chapter-13   A complex process of oxidation reduction in which food is oxidized to release energy is? A) Reproduction B)Digestion C)Respiration E)Excretion   Atmospheric air contains: A) 10% oxygen C) 17% oxygen B)15% oxygen D)21% oxygen E)2% oxygen   In higher plants, gas exchange through entire surface of leaves and stem is prevented due to external, waxy covering called. A) Chlorophyll B) Cuticle C)Chitin D) Cellulose  …