Plant Tissues (Grade 10 NSC Matric Life Sciences): Flashcards
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Two main categories of plant tissues
Two main categories of plant tissues
Meristematic tissues and permanent tissues
What are meristematic tissues?
What are meristematic tissues?
Tissues with undifferentiated cells that divide continuously
What do guard cells control?
What do guard cells control?
Opening and closing of stomata (pores in leaf epidermis)
Function of trichomes
Function of trichomes
Trap water above stomata and reduce water loss
Most common type of plant tissue
Most common type of plant tissue
Parenchyma
Key feature of collenchyma cells
Key feature of collenchyma cells
Thickened corners with cellulose/pectin; provides flexibility
State of sclerenchyma cells at maturity
State of sclerenchyma cells at maturity
Dead with thick, lignified cell walls
Two main functions of xylem
Two main functions of xylem
Structural support and transport water with minerals upward
What does phloem transport?
What does phloem transport?
Organic nutrients (mainly sucrose) from leaves to all parts
Role of companion cells in phloem
Role of companion cells in phloem
Provide energy & control for sieve tubes via plasmodesmata