Plant cell organisation

• Where are the stomata found

  In the lower epidermis
• Meristem tissue

  Made up of plant stem cells
• Which structures help to minimise water loss

  Waxy cuticle which is impermeable to water

  Guard cells which can close stomata
• Why is the upper epidermis transparent

  To allow light to pass through and reach the mesophyll cells which is where photosynthesis happens
• Is the spongy mesophyll an organ or tissue

  Tissue
• Why does the spongy mesophyll have so many air gaps

  To allow carbon dioxide to diffuse from the stomata to the palisade mesophyll cells
• How does the level of water affect the opening and closing of stomata

  When there is plenty of water the guard cells become turgid opening the stomata.

  When there isn’t much water the guard cells become flaccid closing the stomata
• Roof of plant

  Waxy cuticle
• Guard cells location

  Situated next to the stomata at the bottom
• Openings in the cell

  Stomata
• Bottom of plant cell

  Lower epidermis
• Top part below waxy cuticle

  Palisade mesophyll layer
• Middle of cell

  Spongy mesophyll layer
• Top part of plant cell

  Upper epidermis