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Explanation: All surfaces of the leaf have some amount of stomata for regulating gas exchange for photosynthesis. However, the lower epidermis (the underside of the leaf) has more, because it is more often in the shade and so it is cooler, which means evaporation won't take place as much

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Plants have more stomata depending on environmental conditions.

  • Stomata are structures localized in the plant epidermis, which are involved in the exchange of water and CO2 with the surrounding environment.

  • These structures (stomata) normally open during the day to absorb the CO2 required for photosynthesis and close during the night to prevent water loss.

  • The amount of stomata in plant cells is directly associated with the environmental conditions in which the plant lives.

  • For example, plants in moist environments need to have more stomata in order to eliminate excess water.

  • Conversely, desertic plants such as cacti have few stomata that open at night because during cooler night temperatures these plants lose less water through stomata.

In conclusion, plants have more stomata depending on environmental conditions.

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