Biology
Grade-9
Easy

Question

Which of the following are modes of passive transport?

  1. Osmosis
  2. Diffusion
  3. Both a and b
  4. None of these

hintHint:

There are three types of passive transport:
  • Simple Diffusion.
  • Facilitated Diffusion.
  • Osmosis

The correct answer is: Both a and b


    • There are three main types of passive transport: Simple diffusion – the movement of small or lipophilic molecules (e.g. O2, CO2, etc.)
    • Osmosis – the movement of water molecules (dependent on solute concentrations) Facilitated diffusion – the movement of large or charged molecules via membrane proteins (e.g. ions, sucrose, etc.)

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