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Question

Substances like carbon dioxide and oxygen move across the cell membrane by the process of:


  1. Photosynthesis

  2. Diffusion

  3. Transpiration

  4. Respiration


Solution

The correct option is B

Diffusion


Diffusion is the process in which particles spread out from each other. They move from high concentration to an area of low concentration until they are evenly distributed. Transpiration is the process where plants absorb water through the roots and then give off water vapour through pores in their leaves. Photosynthesis is the process by which plants prepare their own food utilizing the energy from sunlight to produce glucose from carbon dioxide and water. Respiration is a process in living organisms which involve the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances. 

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