The Structures of Seed Plants

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The Structures of Seed Plants

• Chapter 4 Section 4B

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A Plants Food Factories

• Leaf Function
• Make food for the plant by capturing the energy
  in sunlight.
• Absorbing carbon dioxide from the air
• Allowing water to escape the plant

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Leaf Structure

• The top and bottom layer of the leaf is called
  epidermis.
• Tiny pores in the epidermis are called stomata
  and allow carbon dioxide to enter the leaf.
• Guard cells open and close the stomata.
• Green organelles in the leaf cell are
  chloroplasts and carry out photosynthesis.
• The leaf contains xylem to transport water and
  phloem to transport sugar.

4
Leaf Adaptations

• The cactus has modified leaves in the form of
  spines.
• The sundew has leaves modified to catch insects.

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Flowers adaptation for reproduction

• Sepals cover and protect the immature flower.
• Petals attract insects to aid in reproduction
• Stamens male reproductive part
• Anthers area of the stamen where pollen is
  produced
• Pistils female reproductive part
• Stigma area where the pollen collects
• Ovary rounded base of the pistil containing the
  ovules each which contain an egg.

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Section Review

• Describe the internal structure of a typical
  leaf. How is a leafs structure related to its
  function?
• Which flower structure produces pollen?
• Compare the functions of xylem and phloem in
  roots, stems, leaves, and flowers.

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