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Plants Angiosperms vs Gymnosperms Leaf Structure/Adaptations

Plants Angiosperms vs Gymnosperms Leaf Structure/Adaptations. What are the parts of a leaf? Cuticle-waxy covering to protect from water loss Palisade layer- column shaped cells containing chloroplasts, site of most photosynthesis

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Plants Angiosperms vs Gymnosperms Leaf Structure/Adaptations

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  1. PlantsAngiosperms vs GymnospermsLeaf Structure/Adaptations

  2. What are the parts of a leaf? • Cuticle-waxy covering to protect from water loss • Palisade layer- column shaped cells containing chloroplasts, site of most photosynthesis • Spongy mesophyll- loosely packed with air spaces allowing gases to circulate • Stomata- openings in leaf for gas exchange • Guard cells- cells which control the size of the stomata

  3. Add transpiration The evaporation of water from plants. How does this help the plant maintain homeostasis?

  4. What are some different adaptations leaves can have?

  5. Leaf adaptations • spines- cactus spines protect the plant from predators & water loss B. Tendrils- leaflets that are modified for climbing

  6. C. Thick leaves- modified for water storage D. Pitcher type leaves-modified for catching insects

  7. Comparing Gymnosperms to Angiosperms

  8. Gymnosperms; • Non flowering vascular plants • Example: conifer • 1. Cone bearers: seeds found on scales of cone • 2. Needle like leaves with tough cuticle • 3. Shallow roots • 4. Bark to reduce water loss • 5. Evergreens: retain leaves all year • 6. Male cone produces pollen • 7. female cone produces seeds

  9. Angiosperms: flower producing plants; most successful plant group on earth, 250,000 species

  10. Plant Responses Tropism- a plants response to its environment. There are 3 types

  11. Geotropism A plants response to gravity

  12. Phototropism A plants response to light

  13. Thigmotropism A plants response to touch

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