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17 Cards in this Set
- Front
- Back
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What are meristems?
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embryonic tissue regions or populations of cells retain the potential to divide long after embryogenesis is over.
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What are apical meristems?
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found at the tips of all roots and stems
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What are initials?
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the cells that maintain the meristem as a continuing source of new cells-that is, the cells that perpetuate the meristem
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What is a derivative?
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initials divide in such a way that one of the sister cells remains in the meristem as an intial while the other becomes a new body cell
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What is primary growth?
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extension of the plant body and formation of the primary tissues
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What meristems develop from apical meristems? what are they called?
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Primary meristems are called procambium, ground meristems and protoderm
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what are tissues?
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Groups of similar cells organized into a structural and functional unit
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What are complex and simple tissues?
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simple- consists of only one type of cell
complex tissues- consists of more than one type of cell |
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What is the ground tissue system? and what are they called?
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three simple tissue types-
parenchyma, schlernechyma and collenchyma |
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Describe parenchyma.
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the most common type of tissue found in primary plant body, soft part of fruits and vegetables,
impt. in regeneration and wound healing, impt. when root cuttings |
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Describe the distribution of parenchyma.
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often have spaces between cells
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Is parenchyma living at maturity? capable of cell division?
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living at maturity and capable of cell division
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Describe the functions of parenchyma cells and what it is made up of.
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store water and nutrients, made up of starch grains, oils, tannins and crystals
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What is parenchyma called when filled with chloroplasts and what does it make up?
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chlorenchyma, make up a majority of leaves
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Is collenchyma living at maturity?
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yes living at maturity
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Describe the structure of collenchyma cells.
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Walls generally thicker and more uneven than parenchyma,
Generally longer than are wide Pliable and strong walls |
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Describe collenchyma.
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occurs just beneath the epidermis, provides flexible support for growing and mature organs, border veins in eudicots
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