SB6 Plant structures and their functions Flashcards Preview

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Flashcards in SB6 Plant structures and their functions Deck (3)
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What are the different tissues in a leaf. List in order from top to bottom

Waxy cuticle
Upper epidermis
Palisade layer
Spongy mesophyll and vascular bundle
Lower epidermis, guard cells and stomata
Waxy cuticle


What are the functions of each of the tissues in the leaf

Waxy cuticle - prevent water loss (by evaporation)
Upper epidermis - transparent to allow light to pass through to the palisde layer
Palisade layer - where photosynthesis occurs
Spongy mesophyll - contains air spaces for more efficient gas exchange
Vascular bundle - provide water and take the glucose from photosynthesis
Lower epidermis - contains guard cells which open and close the stomata for efficient gas exchange


What are some adaptations that plants have to live in extreme conditions

- stems to store water
- deep roots to collect water from deep underground
- spines (modified leaves) to minimize surface area so water loss is reduced and for protection from harmful animals
- very thick waxy cuticle to reduce water loss by evaporation
- less stomata to prevent water loss by transpiration