Stems Flashcards
1
Q
Stem Functions
A
- Support and elevation of leaves
- Conduction
- Storage of starches and water
2
Q
Shoot
A
Stem with associated leaves and buds
3
Q
Node
A
Point of stem where leaves attach
4
Q
Internode
A
Region of stem b/w 2 adjacent nodes
5
Q
Tunica
A
Outer covering of meristem
6
Q
Corpus
A
Inner layers of meristem
7
Q
Apical meristem structure of stems
A
Tunica (Outside)
Corpus (Inside)
8
Q
Buds
A
Embryonic shoot
-Terminal and auxillary
9
Q
Terminal Buds
A
Buds at tips of branches
10
Q
Primary growth during spring
A
- Internodes lengthen out (at same time)
- Increase stem length
- Leaves behind terminal bud scale scar
11
Q
Auxillary (Lateral) Buds
A
Buds found in axil of stem and leaf
-Grow into branches, flowers or inflorescences
12
Q
Primary growth in stems
A
- Occurs when buds lengthen out
- Not divided into zones
- Occurs due to simultaneous elongation of cells at the internodes of a bud
13
Q
Dicot Stems
A
- Cortex and pith
- Vascular bundle ring
- Secondary growth possible
14
Q
Monocot Stems
A
- Ground tissue not divided into cortex and pith
- Scattered vascular bundle
- No secondary growth
15
Q
Vascular bundle structure
A
- a strand of vascular tissue with phloem to outside and xylem inside
- Often with fibers
- Bundle cap
- Bundle sheath
