Plant Cells 2.0. Flashcards
Examples are Mosses, liverworts
Nonvascular
More dependent on ample water
Nonvascular
Lack roots, leaves or stems
Nonvascular
Nonvascular have this instead of roots
Rhizoids
More than 90% of all modern plants
Vascular
They have roots for water absorption and
support
Vascular
Leaves have chlorophyll for photosynthesis
Nonvascular
Nonvascular leaves are covered with
Cuticle
Nonvascular leaves provide this with gaseous exchange
Pores
Plant Diversification
Lignin
Bud Scales
Seeds
Cells walls of new plants are harder. Caused woody plants to grow much taller than
other plants
Lignin
Protect them from winter’s cold
Bud scales
A protective structure that contains a plant
embryo and stored food
Seeds
Include all the nonvascular plants
1. Mosses
2. Liverworts
3. hornworts
Bryophyta
classified into seedless plants and
seed plants
Vascular plants
Seed Plants
Gymnosperms
Angiosperms
Producing seeds that lack a protective fruit like bamboo
Gymnosperms
Producing seeds enclosed and protected by a
fruit. Flowering plants
Angiosperms
Only one cotyledon
like Lilies, orchids, corn
Monocot
Have two cotyledons
Roses, beans, clovers
Dicot
To absorb water and minerals
Roots
Vascular tissue, the cortex, surround the
vascular cylinder. Grow deep into the soil
Dicot roots
The vascular tissue forms a ring that surrounds
a central region of cells called pith
Monocot Roots
Separated the cortex from the vascular cylinder
Endodermis
The cells of the endodermis are coated with
waxy layer
Casparian Strip
Root Types
Primary roots
Taproot
Fibrous root
First root to emerge from seed
Primary roots
Primary root enlarges. Can grow to collect water from the deeper part
of the soil
Taproot
Numerous and are extensively branched. Collect water from a wide area and are excellent
for preventing soil erosion
Fibrous roots
Hold leaves up to sunlight and transport water
and food between roots and leaves
Stem
Vascular tissue in stems is arranged in
Vascular bundles
Vascular tissue in roots
Central cylinder
Have vascular bundles that form a ring that
divides the ground tissue into cortex and pith
Dicot stems
Have bundles that are scattered throughout the
grand tissue
Monocot stems