PLANT BIOLOGY Flashcards
dermal tissue - epidermis (3 different types)
cuticle, stoma, trichomes
ground tissue (how many parts? and what are they called?)
3 parts - parenchyma, collenchyma, sclerenchyma
parenchyma (what is it?)
“workhorse cells”, totipotent: an form a complete new plant
collenchyma (what is it?)
flexible structural support
sclerenchyma (what is it?)
structural supports; fibres, often dead tissue
vascular tissue (how many parts?)
2 parts
xylem (function and direction and what kind of transport)
transports water; roots -> shoots (passive transport)
phloem (function and direction and what kind of transport?)
transports nutrients such as sugars and amino acids in both directions (roots->shoots, shoots-> roots) (with or against conc. gradient)
meristems (what is it? where is it located?)
population of undifferentiated stems - apical meristems: located at the tip of the root and shoot (primary growth, up and down)
ground meristem (what is its function)
gives growth to ground tissue
protoderm (what is its function?)
gives growth to dermal tissue
procambium (what is its function?)
gives growth to vascular tissue
primary growth (what is it? from where?)
up (taller=more sun) and down (better root system=more nutrients/water from soil), root and shoot, from apical meristems
secondary plant growth (what is it? where does it occur?)
only occurs in plants that have cambium (special type of meristem, lateral growth)
cork cambium (what is it?)
outside, protection
