roots Flashcards
tap roots🥕
where 1 main root grows down
fiberious roots🌱
where a mads of small, branched roots emerge from stem
adventitious roots
eg of fibrous roots
eg onion 🧅
functions
anchor the plant in soil
absorb water and mineral
transport absorbed minerals to shoot
storage of food
zones of a root (longitudinal section)
1-ZONE OF PROTECTION( protects the root as it pushes through the soil)
2- MRISTENATIC ZONE-rapidly multiplying cells (mitosis) root tip
3-ELONGATION ZONE-growth regulators auxins
zones of differntation
dermal tissue-
epidermis-protects plant
ground tissue
structural strength
vascular tissue💧
transports material
xylem-water
phloem-food
leaf scar
indicate where a leaf has fallen
apical
produces the following years of growth
scale
mark the location of previous apical buds
stem functions
transports food in the leaves to the roots
transports water+minerals from the roots to the leaves+flowers
supports aerial parts of the plant
stores food🥔
protection
photosynthesis☀️
leaf functions
photosynthesis
exchange of gases
water
store food
plant tissue
dermal tissue-epidermis protects plant
ground tissue-found between dermal+vascular.-structural
vascular tissue-consists of phloem and xylem
main function-transport
xylem made of vessels and tracheids
xylem is dead
xylem functions
transports water + minerals salts from roots to leaves
gives mechanical support to plant
xylem is located in
roots
stem
🍂
🌸
herbaceous plants
do not contain wood
woody plants
contain wood 🪵 eg oak
node
a point on a stem at which a leaf is attached
internode
a region on a stem between 2 nodes
lenticel
an opening on a stem for gas exchange
