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Questions and Answers
What primary role does parenchyma tissue serve in plants?
What primary role does parenchyma tissue serve in plants?
- Support for the plant structure
- Metabolic processes and storage (correct)
- Water conduction
- Mechanical protection
Which cell type is primarily responsible for support in the young, elongating stems of plants?
Which cell type is primarily responsible for support in the young, elongating stems of plants?
- Collenchyma (correct)
- Fibers
- Sclereids
- Parenchyma
Which of the following characteristics is true for fibers in plants?
Which of the following characteristics is true for fibers in plants?
- They are commonly found in the phloem
- They are generally long and often lignified (correct)
- They are always alive at maturity
- They have a primary and thin secondary cell wall
In which location would you most likely find sclereids in a plant?
In which location would you most likely find sclereids in a plant?
What type of cell wall do collenchyma cells possess?
What type of cell wall do collenchyma cells possess?
Which of the following statements about tracheids is correct?
Which of the following statements about tracheids is correct?
Which cell type is not typically living at maturity?
Which cell type is not typically living at maturity?
What primary function does parenchyma fulfill besides storage?
What primary function does parenchyma fulfill besides storage?
What is the primary characteristic of vessel members in angiosperms?
What is the primary characteristic of vessel members in angiosperms?
Which of the following statements about sieve cells is true?
Which of the following statements about sieve cells is true?
What type of cell is primarily responsible for food conduction in angiosperms?
What type of cell is primarily responsible for food conduction in angiosperms?
Which type of cells contain secondary walls and are generally elongated as well?
Which type of cells contain secondary walls and are generally elongated as well?
What is a major distinguishing feature of sieve-tube members compared to sieve cells?
What is a major distinguishing feature of sieve-tube members compared to sieve cells?
Which characteristic is true for all xylem cells mentioned?
Which characteristic is true for all xylem cells mentioned?
What characteristic distinguishes albuminous cells from sieve-tube members?
What characteristic distinguishes albuminous cells from sieve-tube members?
How do tracheids differ from vessel members in terms of length?
How do tracheids differ from vessel members in terms of length?
Flashcards
Parenchyma Cell
Parenchyma Cell
A versatile plant cell that performs metabolic functions, storage, and conduction; typically polyhedral (many-sided) and has a primary cell wall or a primary and secondary cell wall.
Collenchyma Cell
Collenchyma Cell
Plant cells specialized for support in young stems and leaves; characterized by unevenly thickened primary cell walls.
Fiber Cell
Fiber Cell
Plant cells that provide structural support, typically long and have thick, often lignified, primary and secondary cell walls.
Sclereid Cell
Sclereid Cell
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Tracheid
Tracheid
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Plant Cell Types
Plant Cell Types
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Xylem
Xylem
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Cell Wall Types
Cell Wall Types
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Vessel Member
Vessel Member
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Sieve Cell
Sieve Cell
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Sieve-tube member
Sieve-tube member
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Albuminous cell
Albuminous cell
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Dead at maturity
Dead at maturity
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Study Notes
Plant Cell Types Summary
- Parenchyma:
- Shape: Often polyhedral (many-sided), variable
- Cell wall: Primarily primary, or primary and secondary. May be lignified (strengthened), suberized (waterproofed), or cutinized (protective coating).
- Living at maturity, involved in metabolic processes (respiration, digestion, and photosynthesis), storage, conduction, and healing.
- Collenchyma:
- Shape: Elongated
- Cell wall: Unevenly thickened, primarily primary, and non-lignified
- Living at maturity; Supports primary plant body
- Found beneath epidermis in young elongating stems; sometimes in cortex of stems. Often near xylem and phloem in monocots and dicots.
- Fibers:
- Shape: Generally very long
- Cell wall: Primary and secondary cell wall, often lignified
- Mostly dead at maturity
- Supports plant body; typically found in stems and roots.
- Sclereids:
- Shape: Variable; usually shorter than fibers
- Cell wall: Primary and thick secondary wall, generally lignified
- May be living or dead at maturity
- Mechanical and protective role
- Found throughout the plant
- Tracheids:
- Shape: Elongated, tapering
- Cell wall: Primary and secondary, lignified; contains pits
- Dead at maturity.
- Chief water-conducting element in gymnosperms, and some seedless vascular plants; seen in some angiosperms as well
- Vessel Members/Sieve Elements:
- Vessel Member:
- Shape: Elongated, typically not as long as tracheids
- Cell wall: Primary and secondary, lignified; with pits and perforations. Several joined together in a vessel.
- Dead at maturity; forms main water-conducting tubes in angiosperms
- Sieve Cell:
- Shape: Elongated, tapering
- Cell wall: Primary in many species with sieve areas; callose often associated with walls and pores
- Living at maturity; Part of phloem, chief food-conducting element in gymnosperms, and seedless vascular plants. - Also involved in angiosperms
- Vessel Member:
Additional Cell Characteristics
- Albuminous cells: Living at maturity; either lacks nucleus, or has remnants. Shape: Often elongated. Plays a role in transporting food. Located within phloem
- Sieve tube members: Living at maturity, associated with sieve cells, not derived from the same mother cell. Elongated shape, primary cell wall with sieve areas and large pores (sieve plates). Involved in transporting food. Located in phloem
- Companion cells: Closely associated with sieve-tube members, derived from the same mother cell. Varoius shapes, primarily elongated. Living at maturity, involves in transporting food. Located in phloem
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Description
Explore the distinct types of plant cells, including parenchyma, collenchyma, fibers, and sclereids. This quiz covers their shapes, cell wall characteristics, and roles in the plant body. Test your knowledge on how each cell type contributes to plant structure and function.
