Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Developmental
Lecture 11
| Question | Answer |
|---|---|
| In plants ____ occurs throughout the life cycle and is influenced by the ____ ____. Hence a plant can adapt its structure to changes in the environment. | Organogenesis ; External Environment - This is necessary b/c plants cannot move to new location if the environment becomes unsuitable. |
| SAM | Shoot apical meristem |
| AB | Auxiliary bud |
| Cotyledons | Seed leaves |
| Epicotyl | Stem above the cotyledons |
| Hypocotyl | Stem portion between cotyledon and root |
| Leaf Axil | Junction between main stem and leaf |
| ____ are regions of cell division. They are ____ like throughout the life of the plant. They are constantly generating new plant organs. | Meristems ; Embryonic |
| In plants ___ determines cell fate. | Position |
| Apical Meristem ---> | Growing tip of shoot and root |
| Outer layers L1 and L2 ---> | Tunica |
| Interior layers L3 ---> | Corpus |
| Slow cell division | The center in the Central Zone and consists of cells with lots of small vacuoles that renew the meristem |
| Rapid cell division | Peripheral Zone surrounds the Central Zone - the morphogenetic region. It contains cells that form the organs |
| ___ plants can be used to study final destination of cells | Chimeric |
| L1 | Epidermis |
| L2 | Bulk of leaf and flower |
| L3 | Central portion of organ and stem |
| Phyllotaxy | position of leave on the stem. Involves communication among existing and newly formed leaf primordium |
| Auxins | allow for cell elongation or expansion. This causes cell wall expansion leading to change in organ pattern |
| ___ may change as the plant matures (i.e. spiral Whorled) or by external manipulation (cut the meristems) | Phyllotaxy |
| ___ can have one leaf, 2 leaves or 3 leaves (leaves/node). The nodes are alternating (180). This is due to chemical and physical interaction and constraints | Whorls |
| Leaves arranged as ___ and ___ | Spiral ; Whorls |
| ___ ___ is the junction between leaf & main stem. Axillary meristems are found in leaf axils and produce axillary buds | Leaf axil |
| ___ Displays apical dominance – suppress axillary meristems get Christmas tree appearance | SAM |
| Remove SAM ---> | Bushy appearance |
| Adventitious | forms from surface cells on stems and leaves ---> bushy appearance even without SAM |
| Cylinder type meristems | cambrium layer causes increase in width of plants or production of bark. |
| Root cap is for ___ | protection |
| Zone of Cell Division | is the meristematic region just below the root cap |
| Zone of Cell Elongation | is where the cells elongate |
| Zone of Cell Differentiation | is where cells differentiate into Xylem and Phloem as well as where lateral roots and root hairs form |
| Quiescent Center of Root Meristem contains: | slowly dividing cells |
Created by:
AshCha
Popular Biology sets