Chapter 35 study guide Body plan for a tomato plant a

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Chapter 35 study guideBody plan for a tomato
plant (a)

• Ground tissue parenchyma
• location leaf mesophyll, cortex of stem root,
  fruits
• form spherical, oblong, have primary walls
• function photosynthesis, storage
• alive at maturity

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• Ground tissue collenchyma
• location continuous strands in stem, petiole
• form oblong, thickened primary cell wall
• function support
• alive at maturity

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• Ground tissue sclerenchyma
• location in masses, scattered in some fruits
• form thick, lignified secondary cell walls
• fibers long, slender
• sclereids star-shaped
• function strength, support
• dead at maturity

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Vascular tissue

• Vascular tissue xylem
• location extends throughout plant
• form thick, lignified secondary cell wall with
  pits
• function conduct water and minerals support
• dead at maturity
• Xylem can be made up of either
• tracheids elongated, tapering tubes
• vessel elements elongated, fat tubes with
  perforation plates at cell ends together they
  form vessels
• only in the flowering plants

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• Vascular tissue phloem
• location extending throughout plant
• form thick primary cell walls with sieve areas
  between cells
• function conduct photosynthate around plant
• alive but no nucleus at maturity
• Phloem can be made up of either
• sieve tube elements
• have sieve area, connected end-to-end
• have companion cells

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• Vascular tissues
• Root functioning

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• Dermal tissue epidermis
• location outermost cells on the plant
• form variable, some specialized, often covered
  with cuticle
• function protect against water loss
• alive at maturity
• cell types
• normal epidermal cells (sometimes called pavement
  cells)
• hair cells, also called trichomes
• guard cells

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• 1. What is the process by which meristems
  continually replenish?
• Each time a meristem cell divides, one cell
  becomes specialized but the other cell remains
  meristem.
• Secondary growth_v2

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• 2. What tissues comprises wood?
• Secondary xylem is the main component of wood.
• What is wood?
• Wood is almost entirely secondary xylem
• It includes cells that are active and inactive at
  water conduction
• heartwood is the inner, inactive wood that has
  been filled with tannins, resins
• sapwood is the outer, conductive xylem

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• 3. What comprises the dermal system of plants
  that are limited to primary growth?
• The dermal system of plants with only primary
  growth is the cuticle covered epidermis

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• 4. Compare the arrangement of vascular tissue in
  primary and secondary growth of stems.
• In primary growth xylem and phloem are together
  in the same bundle. In secondary growth, the
  xylem is toward the inside and the phloem is
  toward the outside.

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• Review of tissues Life  eLearning