The Plant
By: Teddy Frisk
Origin of Plant
A
plant is a multicellular eukaryote.
 Plants evolved from filamentous green
algae that lived in the ancient oceans.
 Leafless plants later moved to land.
Adaptations in Plants
As plants moved from the oceans to land,
they had to adapt to survive.
 The adaptations were:


Cuticle; the development of leaves, roots,
stems, & vascular tissues.
Alteration of generations; and the evolution
of the seed.
Cuticle
 Waxy
waterproof coating of stems &
leaves of most plants.
Leaves/Roots/Stems
 Leaves:
Plant organ that grows from a
stem, and usually where photosynthesis
occurs.
 Roots: Plant organ that absorbs water &
minerals from soil.
 Stems: Plant organ that provides support
for growth.
Vascular Tissues
 Tube-like
cells where water, food, & other
materials are transported.
Alteration of Generations
2 stages; the gametophyte generation,
and the sporophyte generation (life cycle
of plant).
 Gametophyte generation: All cells are
haploid.
 Sporophyte generation: All cells are
diploid, & are produced by mitosis & cell
division.
Seed
 Plant
organ that contains an embryo,
along with a food supply.
Plant Kingdom
Grouped into major categories called
divisions.
Nonvascular Plants
 They
are in the divisions Anthocerophyta,
Hepaticophyta, & Bryphyta.
 They produce mainly by using spores.
 They don’t produce seeds.
Non-seed Vascular Plants
 They
are in the divisions Psilophyta,
Lycophyta, Arthrophyta, & Pterophyta.
 Their tissues conduct water & other
materials & reproduce mainly by spores.
Vascular Seed Plants
 They
are in the divisions Cycadophyta,
Gnetophyta, Ginkgophyta, &
Coniferophyta produce seeds on cones.
 Male cones & females cones can be on
separate plants or the same plant.
Anthophyta Division
 It
includes vascular, seed-producing
plants that flower.
 Fruits with seed develop from flowers.
 Anthophytes are divided into two groups;
monocotyledons & dicotyledons.