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Questions and Answers
Which of the following describes the most accurate comparison between xylem and phloem?
Which of the following describes the most accurate comparison between xylem and phloem?
- Xylem provides structural support, while phloem is primarily involved in photosynthesis.
- Xylem is composed of living cells supported by companion cells, while phloem is composed of dead cells.
- Xylem transports water and minerals upwards, while phloem transports sugars bidirectionally. (correct)
- Xylem transports sugars, while phloem transports water and minerals.
If a plant is wilting due to lack of water, which tissue is most directly affected?
If a plant is wilting due to lack of water, which tissue is most directly affected?
- Ground tissue
- Dermal tissue
- Xylem tissue (correct)
- Phloem tissue
In a leaf, which tissue type is primarily responsible for photosynthesis, and where is it located?
In a leaf, which tissue type is primarily responsible for photosynthesis, and where is it located?
- Dermal tissue; inner mesophyll
- Ground tissue; beneath the epidermis (correct)
- Vascular tissue; throughout the leaf
- Dermal tissue; outer layer
The epidermis secretes a waxy cuticle. What is the primary function of the cuticle?
The epidermis secretes a waxy cuticle. What is the primary function of the cuticle?
If a scientist is studying the transport of sugars from the leaves to the roots, which specific cells would they focus on within the phloem tissue?
If a scientist is studying the transport of sugars from the leaves to the roots, which specific cells would they focus on within the phloem tissue?
Flashcards
Dermal Tissue
Dermal Tissue
Protective outer layer of the plant, also known as the epidermis.
Ground Tissue
Ground Tissue
Tissue that provides support, storage, and is involved in photosynthesis.
Vascular Tissue
Vascular Tissue
Tissue responsible for transporting water, minerals, and sugars in the plant.
Xylem
Xylem
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Phloem
Phloem
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Study Notes
Plant Tissue Types
- Plants have three major tissue types: dermal, ground, and vascular.
- These tissues are found in all plant organs (leaves, stems, and roots).
Dermal Tissue
- Function: Protection and covering.
- Location: Outermost layer of herbaceous (non-woody) plants. Also known as epidermis.
- Root system function: Water and mineral uptake.
- Shoot system function: Gas exchange (oxygen and carbon dioxide).
- Leaves and stems function: Secretion of cuticle (waxy substance) to protect from microorganisms and prevent water loss.
Ground Tissue
- Function: Support, storage, and photosynthesis.
- Location: Beneath the epidermis in stems, roots, and leaves.
- Stem function: Provides structural support.
- Root function: Food and water storage.
- Leaf function: Site of photosynthesis, energy production.
Vascular Tissue
- Function: Transport of water, minerals, and sugars.
- Components: Xylem and phloem.
- Xylem:
- Function: Transports water and minerals from roots to shoots (upward movement).
- Structure: Hollow, dead cells (vessel elements) joined together with perforations.
- Phloem:
- Function: Transports dissolved sugars (products of photosynthesis) throughout the plant.
- Structure: Sieve tube cells with perforated end walls; supported by companion cells.
- Sugar use: Sugars are used for respiration(ATP production), cellulose synthesis for structure, or starch storage.
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