19754380
Description
| Question | Answer |
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HOW FLUID TRANSPORTS UP THE XYLEM
Image:
Sun (binary/octet-stream)
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Heat from the sun is a driving force for ascent of sap through plants Transpiration, cohesion & tension explain most water movement |
| Cohesion in the Xylem | -Attraction (hydrogen bonds) between water molecules (WATER TO WATER) -column of water forms from roots to leaves |
| Adhesion / tension in the Xylem | Attraction (hydrogen bond) between water and xylem cells |
| Transpiration (& evaporation) in the Xylem (& stoma) | •Removes water from leaves •Continuously pulls up a column of water by bulk flow |
| 1 of 6 Adaptations: Diploid Sporophyte | •Diploid dominant generation of all plants are more apt to survive genetic damage •2 copies of each chromosome allow recessive mutation to be masked |
| 2 of 6 Adaptations: Cuticle | Waxy covering that reduces desiccation (drying out) |
| 3 of 6 Adaptations: Vascular system | •Phloem for food / sugar transport •Xylum / roots obtain water & anchor plant •Leaves & stems to support & maximize photosynthesis |
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4 of 6 Adaptations: Sperm Adapted
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Bee (binary/octet-stream)
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•Primitive sperm was flagellated and needed water to swim to eggs •Advanced sperm (pollen) adapted for delivery by wind or animals |
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5 of 6 Adaptations: Gametophyte/Seeds
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Seed (binary/octet-stream)
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Angiosperm - seed protected inside an ovary / produce flowers (apple) Gymosperm- Naked seeds with no ovary & no flower (pine cone) |
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6 of 6 Adaptations: Seasonal Variation
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Fall (binary/octet-stream)
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Deciduous Trees – shed leaves during slow-growing seasons to minimize water loss Desert Annuals – produce seeds within brief growing seasons in response to spring rain |
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