Gaseous exchange in land plants takes place through stomatal openings,while in submerged hydrophytes it takes place by

  • A
    Lenticels
  • B
    Stomata
  • C
    Hydathodes
  • D
    General surface of the cells by diffusion

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The diffusion membrane of the lungs,through which the exchange of gases occurs,is made up of which of the following layers?

What is the partial pressure of oxygen $(pO_2)$ in the alveoli of the lungs compared to the blood?

The diffusion membrane of the lungs is made up of which of the following layers?

Explain: Diffusion of $O_2$ from alveoli to tissues and of $CO_2$ from tissues to alveoli.

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