ch 35 Flashcards
Plant body comprises what two major systems?
Shoot system and Root system
What is the shoot system
All shoot tissues are derived from the shoot apical meristem
What is the root system
All root tissues are derived from the root apical meristem
What is a cell
a fundamental unit of life
what is a tissue
group of cells consisting of one or more types
Organ
consists of several types of tissues that carry out particular functions
The root and shoot system results in what 3 basic organs
Roots, stems, and leaves
What does the root do
a root is an organ that anchors the plant in the soil, asborbs minerals and waters, and stores carbohydrates
small vascular plants are susceptible to grazing, so what system forms
Fibrous root system
What does the Fibrous root system do
each root forms its own lateral roots, which in turn form their own.
grow in shallow oils
example of fibrous root system
monocots (type of grass)
In most plants, the absorption of water and mineral occurs _
near the tips of elognating roots
What are root hairs
near root tips and increase surface area, constantly replaced
Modified roots: storage
store carbohydrates
stored sugars during flower production
Modified roots: support
Prop roots
structure and support
Modified roots: support
Aerial roots
plants that grow on other plants, die w lack of sun
Pneumatophores
roots that facilitate gas exchange
What is a stem
a plant organ bearing leaves and nodes
What is a node
facilitates leaf growth
What is an internode
area of elongation
Most of the growth of a young shoot is concentrated where
near the gorowing shoot tip (apical bud)
what is a apical bud
main shoot
what is an axillary bud
form branch, dormant in young shoots
Apical dominance
Removal of apical bud signals axillary bud elongation
