Term
| Primary growth lengthens what? |
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Definition
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Term
| Plant growth is indeterminate, what does this mean? |
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Definition
-Growth occurs throughout a plant's life
-Plants are categorized based on how long they live
---annuals
---Biennials
---Perenials |
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Term
| What are annuals, biennials, and perennials? |
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Definition
annuals- complete their life cycle in one year
biennials- complete their life cycle in two years
Perennials- Live for many years |
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Term
| Animal growth is determinate, what does this mean? |
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Definition
| -Growth stops after a certain size is reached |
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Term
Plant growth occurs in specialized tissues called what?
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Definition
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Term
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Definition
| regions of active cell division |
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Term
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Definition
| found at the tips of roots and shoots |
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Term
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Definition
| occurs at apical meristems |
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Term
| What does primary growth allow roots to do? |
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Definition
| push downward through the soil and shoots to grow upward toward the sun |
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Term
| What are apical meristems of root tips covered by? |
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Definition
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Term
| what are the 3 zones in which root growth occurs behind? |
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Definition
-zone of cell division- the apical meristem
-zone of cell elongation-cells lenghthen by as much as 10 times
-zone of maturation- cells differentiate into dermal, vascular, and ground tissues |
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Term
| What occurs as buds at the stem tip and at the base of leaves? |
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Definition
| The apical meristems of shoot tips |
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Term
| What do cells produced in the shoot apical meristem differentiate into? |
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Definition
| dermal, vascular, and ground tissues |
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Term
| Vascular tissue produced from the apical meristem is called primary vascular tissue |
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Definition
-Primary xylem
-Primary phloem |
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Term
| What does secondary growth increase? |
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Definition
| the girth of woody plants |
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Term
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Definition
| occurs at lateral meristems |
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Term
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Definition
| are areas of active cell divistion that exist in two cylinders that extend along the length of roots and shoots |
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Term
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Definition
| is a lateral meristem that lies between primary xylem and phloem |
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Term
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Definition
| a lateral meristem that lies at the outer edge of the stem cortex |
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Term
| Which two directions do vascular cambium produce cells? |
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Definition
-Secondary xylem produces wood toward the interior of the stem
-secondary phloem produces the inner park toward the exterior of the stem |
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Term
| What direction does cork cambium produce cells? |
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Definition
| -cork cambium produces the outer bark, which is composed of cork cells |
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Term
primary growth
secondary growth |
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Definition
growth in height
growth in width |
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Term
| Wood annual rings show layers of secondary xylem |
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Definition
-in temperate regions, periods of dormancy stop growth of secondary xylem
-Rings occur in areas when new growth starts each year |
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Term
| What is sloughed off over time? |
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Definition
| The bark (secondary phloem and cork) |
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Term
ring is thick
ring was thin |
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Definition
grew and was a good year
it didn't grow much and was probably a bad year |
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