Bio144 Plant Structure Growth
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There basic organs of plants
Roots, Stems and Leaves
Two basic parts of plants
Roots and Shoots
Three basic tissue of plants
Dermal, Ground, Vascular
Functions of Shoots and Roots
- Shoots-gather light and CO2 from
- the air
- Roots-take up water and nutrients and help anchor the plant
Plants inhibit what two worlds?
Atmosphere above ground and soil below the surface of the earth
Three characteristics of Monocots
- Monocots are herbaceous
- Do not produce secondary growth
- Most do not produce wood
What is the difference between Monocots and Dicots?
The number of seeds
Characteristics of Simple Leaves
- Primary organ that photosynthesizes
- Flat surface
Characteristics of Modified Leaves
- Protection Ex: Cactus spine
- Nutrient Storage Ex: Onion
- Water Storage Ex: Succulents
- Climbing Ex: Tendrils
Characteristics of Stems
- Provides structure and support
- Consists of nodes and internodes
- Consists of apical (terminal) bud
What are nodes and internodes?
- Nodes are area where leaves attach
- Internodes are segments between nodes
Characteristics of Modified Stems
- Water Storage Ex: Cactus stem
- Asexual Reproduction
- Food Storage
Characteristics of Roots
- Roots absorb and conduct water and nutrients to shoots
- Store products made in shoot
- Can also be morphologically
- Tap root – primary root that runs
- deep vertically
- Lateral roots- branching roots
- run horizontally from primary root
- Fibrous- many small roots forming
- a mat which spreads out vertically and laterally in the soil
Characteristics of Modified Roots
- Specialized for gas exchange
- Storage Roots
What is Dermal Tissue?
- (skin)- a single layer of cells covers and protects the plant body
- Forms barrier between plant and environment
- Prevents water loss and disease
What is Ground Tissue?
- Makes up the majority of the plant body
- Function: photosynthesis and storage
- Responsible for Photosynthesis, CarbohydrateStorage Synthesis and storage of hormones, pigments, and toxins that deter predators
What is Vascular Tissue?
- Vascular tissue runs through ground tissue
- Support tissue and transport of water, nutrients, and photosynthetic products
What are the three components of Ground Tissue?
Parenchyma, Collenchyma, and Sclerenchyma cells
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