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2414906
Adaptations of flowering plants
Descrição
a level Biology Mapa Mental sobre Adaptations of flowering plants, criado por danieladkin em 31-03-2015.
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biology
a level
Mapa Mental por
danieladkin
, atualizado more than 1 year ago
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Criado por
danieladkin
mais de 9 anos atrás
17
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Resumo de Recurso
Adaptations of flowering plants
Xerophytes
Low water availability
Prevent waterloss
Rolled leaves
Reduces leaf area from which transpiration can occur
Sunken stomata
Reduces water potential gradient between surface of the leaf and the atmosphere
Reduces rate of diffusion of water
Thick cuticle
Over leaf surface to reduce rate of cuticular transpiration
Hairs
Trap water vapour and reduce water potential gradient
Marram grass
Sand dune habitat
Mesophytes
Shed leaves before onset of winter
Aerial parts of non woody plants die off and due to frost/cold winds. Underground parts survive
Most annual mesophytes (flower, seed and die in 1 year) survive winter as dormant seeds
Rose
Survive unfavourable times of year
Hydrophytes
Water lily
Poorly developed xylem
Water is supportive medium (very little lignified tissue)
Submerged/partially submerged under water
Upward facing stomata (on top of leaf)
Little/no cuticle
Large air spaces in stems and leaves (lots of CO2 and O2 available when submerged)
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