Flashcards
Leaf Adaptations
Cards in this deck (12)
- 1What's the structure of the leaf top to bottom)?Waxy Cuticle
Upper Epidermis
Palisade Mesophyll Cells
Spongy Mesophyll Layer
Air Space
Vascular Bundle
Lower Epidermis
Stomata
Guard Cells - 2How are leaves adapted?Flat and thin
Arranged so overlapping minimised
Transparent cuticle and epidermis
Palisade cells adapted for photosynthesis
Air spaces in spongy mesophyll
Many stomata
Network of xylem and phloem throughout - 3How does flat and thin help leaves?Large surface area to collect as much sunlight as possible
Short diffusion distance for gasses - 4How does leaf arrangement aid photosynthesis?Overlapping minimised therefore avoids shadowing so maximum possible area exposed to collect sunlight
- 5How does a transparent cuticle and epidermis aid photosynthesis?Lets light pass through to photosynthetic mesophyll cells below
- 6How are palisade mesophyll cells adapted for photosynthesis?Long and thin, forming a continuous later to absorb sunlight
Packed with chloroplasts that collect sunlight
Large vacuole that pushes chloroplasts to the edge of the cell - 7How does the spongy mesophyll layer aid photosynthesis?Allow diffusion of carbon dioxide and oxygen in/ out the leaf
- 8How do stomata aid photosynthesis?>Allow gas exchange
Open and close in response to light intensity - 9Where are the stomata found?Mainly lower epidermis
- 10What do guard cells do?Open and close the stomata
- 11How do guard cells function?Open when turgid
Close when placid - 12How do xylem and phloem aid photosynthesis?Xylem vessels carry water to the lead
Phloem vessels carry away the sugars produced in photosynthesis
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- Biology A Level (Photosynthesis) Flashcards on Leaf Adaptations, created by Alice Hathaway on 04/10/2017.
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- Alice Hathaway
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