Term
| Why is plant growth unique? |
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Definition
| Plant growth is indeterminate and iterative. |
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Term
| growth throughout entire lifetime |
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Definition
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Term
| property of plants to produce the same organs over and over again |
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Definition
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Term
| growth characterized by elongation of plant body |
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Definition
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Term
| causes widening of the plant body, thickening of the stem and roots; present only in woody plants |
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Definition
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Term
| What causes growth of plants at the cellular level? |
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Definition
| cell division and cell expansion |
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Term
| What is another name for nonwoody plants? |
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Definition
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Term
| population of undifferentiated (unspecialized) cells |
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Definition
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Term
| Where does primary growth take place? |
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Definition
| Primary growth occurs at the root and shoot tips in the apical meristems. |
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Term
| What are the two types of meristem cells? |
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Definition
| shoot apical meristem (SAM), which divides to produce stem and leaf tissues, and the root apical meristem (RAM) |
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Term
| protects root apical meristem from damage and desiccation |
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Definition
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Term
| What provides protection to the shoot apical meristem (SAM)? |
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Definition
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Term
| What two meristems cause secondary growth? |
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Definition
| vascular cambium and cork cambium |
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Term
| thin layer of undifferentiated cells that develops within the vascular bundles; creates wood |
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Definition
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Term
| thin layer of undifferentiated cells that develops within the cortex below the epidermis; creates bark |
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Definition
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Term
| spongy tissue in the core of the stem |
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Definition
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Term
| cells that create xylem and phloem |
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Definition
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Term
| develops from procambium and divides to produce secondary xylem inside of the stem and secondary phloem outside of the stem |
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Definition
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Term
| What are the functions of secondary xylem? |
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Definition
| transport of water and minerals, structural support, storage |
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Term
| Only the oldest/youngest secondary xylem moves water |
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Definition
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Term
| located in the center of the stem/trunk; darker, and does not transport materials |
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Definition
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Term
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Definition
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Term
| What causes growth rings in woody plants? |
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Definition
| Seasonal fluctuations in water availability cause growth rings. |
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Term
| secondary xylem present in the spring, moves lots of water |
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Definition
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Term
| secondary xylem produced when less water is available, smaller cells |
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Definition
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Term
| "inner bark" composed of living and dead tissues that transport sugars |
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Definition
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Term
| Why is only the current year's secondary phloem functional? |
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Definition
| Older secondary phloem cells are crushed by new cells |
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Term
| Increase in trunk diameter comes from formation of new ________ and _________. |
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Definition
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Term
| What two things do cork cambium cells divide into? |
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Definition
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Term
| What is the periderm or outerbark made of? |
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Definition
| phelloderm and cork cells |
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Term
| produced outside, dead cells, impregnated with suberin, a waxy, fatty material that is waterproof |
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Definition
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Term
| living cells produced inside |
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Definition
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Term
| What is the function of the periderm? |
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Definition
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Term
| pores in bark which allow for gas exchange |
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Definition
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