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Questions and Answers
Which type of plant tissue is responsible for the movement of fluids or food?
Which type of plant tissue is responsible for the movement of fluids or food?
What function does epidermis tissue serve?
What function does epidermis tissue serve?
Which tissue is responsible for primary growth in plants?
Which tissue is responsible for primary growth in plants?
Meristematic Tissue
Parenchyma cells are types of vascular tissue.
Parenchyma cells are types of vascular tissue.
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What is the main characteristic of cork tissue?
What is the main characteristic of cork tissue?
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The main root in a taproot system is called the ______.
The main root in a taproot system is called the ______.
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What is one function of roots?
What is one function of roots?
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Which part of the root prevents water from entering the xylem by passing between cells?
Which part of the root prevents water from entering the xylem by passing between cells?
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Match the following plant tissues with their functions:
Match the following plant tissues with their functions:
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Study Notes
Plant Tissues Overview
- Plant tissue is a collection of cells organized to perform specific functions.
- Three main types of tissues: Ground, Dermal, and Vascular.
Ground Tissue
- Acts as bulk tissue, responsible for storage and physical support.
- Three key types: Parenchyma, Collenchyma, and Sclerenchyma.
- Parenchyma: Thin-walled cells for food storage and manufacturing.
- Collenchyma: Provides support through thickened walls, often found in stems.
- Sclerenchyma: Strengthened cells with two forms - elongated fibers and short stone cells.
Dermal Tissue
- Protects plant surfaces and facilitates nutrient absorption.
- Epidermis covers leaves, stems, and roots, preventing excessive evaporation.
- Stomata in leaves enable gas exchange, regulated by guard cells with chloroplasts.
Vascular Tissue
- Responsible for the movement of fluids and physical support.
- Xylem conducts water and dissolved substances upwards; consists of tracheids and vessels.
- Phloem transports food downwards from leaves to stems and roots, consisting of sieve tubes and companion cells.
Meristematic Tissue
- Essential for primary growth in plants.
- Includes various types such as epidermis, parenchyma, sclerenchyma, collenchyma, and cork.
Roots and Soil Relationship
- Roots are underground, bud-less structures; serve support and nutrient absorption.
- Two main types of roots: Taproot (one main root with lateral roots) and Fibrous root (many roots of similar size).
Functions of Roots
- Anchor the plant in the soil.
- Absorb water and dissolve minerals.
- Conduct water and minerals upward to the stem and food from leaves downward.
- Serve as storage for food and facilitate reproduction.
- Participate in photosynthesis.
Root Structure
- Endodermis: Inner layer of cortex that regulates water and mineral intake by controlling passage to xylem.
- Casparian Strip: Impermeable barrier ensuring water and minerals enter xylem through endodermal cells.
Root Cross-Section
- Epidermis: Absorbs water, offers protection.
- Cortex: Made of irregularly shaped parenchyma cells for storage of water and food.
- Pericycle: Originates branched roots, contributing to overall root structure and function.
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