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Bio
Plant Form and Function
86
Biology
Undergraduate 1
03/09/2013

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Term
What is the important relationship between form and function in plants:
Definition
Form fits function.
Term
The features of roots are:
Definition
- Carbohydrate storage
- Anchor to substrate
- Absorb water and minerals
- Pneumatophores
- Symbiotic mycorrhizae
Term
What do roots anchor to?
Definition
The substrate
Term
What is the advantage of many roots?
Definition
large surface are for better access to water and minerals and better hold to the substrate.
Term
Symbiotic mycorrhizae
Definition
Symbiotic relationship between fungi and roots.
Term
Pneumatophores
Definition
Roots that project out of the water to access oxygen for plants submerged in water.
Term
What are the functions of stems?
Definition
- Food storage
- Aerial support for leaves, flowers and fruits.
- Asexual reproduction
Term
What are some examples of evolutionary adaptations of stems?
Definition
Rhizomes, bulbs, stolons, tubers.
Term
What are two important features of stems?
Definition
Apical bus and axillary buds.
Term
Apical buds are located...
Definition
At the tip of the shoot or branch.
Term
Axillary buds are located...
Definition
Along a shoot or branch, behind or below the apical bud.
Term
What are the functions of leaves?
Definition
- Energy harvesting through photosynthesis
- Modified for sexual or asexual reproduction.
Term
What are leaves modified into for sexual reproduction?
Definition
Flowers
Term
What are examples of what leaves are modified into for asexual reproduction?
Definition
Tendrils or spines.
Term
Cell types in plants:
Definition
- Parenchyma
- Collenchyma
- Sclerenchyma
Term
What do parenchyma cells do?
Definition
Perform most of plant metabolic functions.
Term
What are two examples of plant metabolic functions that parenchyma cells perform?
Definition
Photosynthesis and starch storage.
Term
What are the cell walls of parenchyma cells like?
Definition
Relatively thin and flexible.
Term
What do collenchyma cells do?
Definition
Support young stems and petioles.
Term
What are the cell walls of collenchyma like?
Definition
Thicker than perenchyma, but relatively flexible.
Term
What do Sclerenchyma cells do?
Definition
Support parts of the plant.
Term
What are the cell walls like in sclerenchyma cells?
Definition
Rigid due to containing abundant lignan.
Term
Which kind of cell are dead at maturity?
Definition
Sclerenchyma cells
Term
What are the two major subtypes of tissue in plants?
Definition
Dermal and vascular tissue.
Term
Dermal tissue
Definition
External protection.
Term
What are examples of dermal tissue?
Definition
Cuticle and Trichomes
Term
Cuticle
Definition
Waxy layers on leaves
Term
What do cuticles do?
Definition
Reduce dessication (extreme dryness)
Term
Trichomes
Definition
hair-like growth
Term
What do trichomes do?
Definition
Deter herbivory and reduce moisture loss
Term
What are the subtypes of vascular tissue?
Definition
Xylem, phloem and ground tissue
Term
Xylem tissue does what?
Definition
Conducts water and minerals.
Term
Xylem tissue is made of what?
Definition
Tracheid and vessel element cells.
Term
Which kind of vascular tissue is dead at functional maturity?
Definition
Xylem
Term
What does phloem do?
Definition
Transports sugars.
Term
Phloem tissue is made of what?
Definition
Sieve cells and sieve tubes.
Term
What does ground tissue do?
Definition
Carries out metabolic functions.
Term
What kind of cells does ground tissue include?
Definition
Parenchyma cells
Term
Meristems
Definition
Region where tissue is actively dividing undifferentiated cells
Term
What are the types of meristems?
Definition
Apical and Lateral Meristems
Term
Apical Meristems produce what kind of growth?
Definition
Growth in length
Term
What is the name of the growth produced by Apical Meristems?
Definition
Primary Growth
Term
Where are apical meristems found?
Definition
Apical buds, axillary buds and root tips
Term
Lateral Meristems produces what kind of growth?
Definition
Growth diameter
Term
What is the name of the growth produced by Lateral Meristems?
Definition
Secondary growth
Term
What are the subtypes of lateral meristems?
Definition
Vascular and cork cambium
Term
Vascular Cambium does what?
Definition
Adds Xylem and phloem
Term
Cork Cambium does what?
Definition
Replaces outer epidermis with more protective periderm
Term
What is the periderm a part of?
Definition
The bark.
Term
Pith
Definition
Ground tissue interior to vascular tissue.
Term
Cortex
Definition
Ground tissue exterior to vascular tissue
Term
Where does Vascular Cambium generate secondary xylem and phloem?
Definition
Secondary Xylem is generated to the inside and secondary phloem to the outside.
Term
Vascular cambium includes what indication of age?
Definition
Growth rings
Term
Growth rings are included in what part of a tree?
Definition
Vascular cambium (Xylem)
Term
Growth rings
Definition
Annual layers of Xylem
Term
The common name wood is named in a more specific fashion as...
Definition
Secondary xylem within the vascular cambium.
Term
Bark
Definition
All tissue exterior to the vascular cambium.
Term
What is bark considered a part of?
Definition
Phloem
Term
Sapwood
Definition
Newer secondary Xylem that continues to transport water and minerals
Term
Heartwood
Definition
Older secondary xylem that does not transport water and minerals
Term
What happens to older phloem tissue as it diameter grows?
Definition
It ruptures
Term
What kind of tissue ruptures as diameter grows
Definition
Old phloem tissue
Term
Lenticels
Definition
Pore-like openings in some roots and stems to enable gas exchange.
Term
What do lenticels create?
Definition
More space between cork cells
Term
Bud scar
Definition
Site of previous year's apical bud.
Term
Leaf scar
Definition
Site of previous year's leaf
Term
Node
Definition
The point on the stem where the axillary bud or leaf scar are located.
Term
Internode
Definition
Space between nodes
Term
Apical Dominance
Definition
When the apical bud inhibits growth of axillary buds
Term
Why does apical dominance happen?
Definition
To compete for sunlight with surrounding plants.
Term
Animals browsing or pruning increases ________________ and leads to a ________________
Definition
Animal browsing or pruning increases axillary growth and leads to a more bushy form.
Term
Root cap
Definition
What protects apical meristem tissue in the roots.
Term
What aids in root growth?
Definition
A polysaccharide slime that lubricates the tip and root caps.
Term
Stomata
Definition
Pores for gas exchange
Term
Guard cells
Definition
Regulates opening and closing of each stoma
Term
What is the singular form of stomata?
Definition
Stoma
Term
How do guard cells regulate stoma?
Definition
Osmosis
Term
Mesophyll
Definition
Middle of leaf
Term
What composes the mesophyll?
Definition
Palisade layer, Spongy layer and vascular tissue (Xylem and Phloem).
Term
Palisade layer
Definition
Tightly packed elongated parenchyma cells
Term
Spongy layers
Definition
Loosely packed parenchyma cells with greater air space.
Term
The palisade layer and the spongy layer are both...
Definition
photosynthetic ground tissue.
Term
Annuals
Definition
Complete life cycle in one year.
Term
Biennials
Definition
Complete life cycle in two years
Term
Perennials
Definition
Live many years
Term
What are examples of perennials?
Definition
Trees and shrubs
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