Reproductive Structures Flashcards
vascular cambium produces how many layers of xylem and phloem
8-10 layers of xylem
1-2 layers of phloem
after a year of growth what forms
additional layer of xylem and phloem
after two years of growth what forms
two layers of xylem (secondary 1 and 2)
phloem is not distinguished
after three years of growth what forms
three xylem layers (1 primary, 2 secondaries)
youngest is near to the vascular cambium
can be differentiated by the size of the cells
summer wood/spring wood
what type of wood is smaller
summer dry season wood
what type of wood is large
spring wood/wet season
makes up the x-section of a tree
secondary xylem layers
tissues that cells are dividing, producing layers of cork
cork cambium
made up of periderm and living phloem
bark
removal of bark to kill large trees enroaching on a habitat
girdling
modified stems examples that are above ground
stolons/runners
tendrils.twining shoots
thorns
succulent stems
modified stems that are below ground
bulb
rhizomes
corms
stem tubers
also called bulliform cells
motor cells
important in the protection against desiccation
motor cells
plants that lose water and cause the unfolding of the eleaves
motor cells
stomata in dicot leaves
hypostomatic (bottom)
stomata in monocot leaves
amphistomatic (either flow)
bulliform in monocot leaves
present in some
bulliform in monocot leaves
present in upper epidermis
mesophyll in dicot leaves
differentiated into palisade and spongy
mesophyll in monooct leaves
undifferentiated
examples of modified leaves
spines
bracts
tendrils
window leaves
succulent
insect trapping
attract pollinators to small flowers
bracts