Chapter
29
Animations
Study Guide
Unit 5: The Evolutionary History of Diversity
Plant Diversity I: How Plants Colonized Land
Review
Land plants (
kingdom
) are a
diverse
group that evolved from
algae,
and are most closely
related
to the
.
Four innovations among the kingdom Plantae are:
Alternation
of
, with
multicellular,
dependent
.
Walled
spores produced in
.
Multicellular
which produce gametes.
Apical
in root and shoot systems.
Bryophytes
lack
tissue with three
phyla
of small herbaceous
plants.
The
large
produce gametes which fuse to yield small
.
Sporophytes
produce haploid
which grow to become the
.
Male gametes are
flagellated
that
short distances to fertilize the egg.
Vascular
plants possess specialized
vascular
tissues called
and
.
Seedless vascular plants have life
cycles
with dominant
and form two phyla.
Lycophyta
includes
mosses,
mosses, and
.
Pterophyta
includes
,
, and
ferns and their relatives.
Seedless vascular plants grew to great heights during the
period and may have led to global
cooling.
Review
Chapter
30
Animations
Study Guide
Unit 5: The Evolutionary History of Diversity
Plant Diversity II: The Evolution of Seed Plants
Review
Seed
plants
continued the
evolution
of smaller
in the
of generations.
Gymnosperms
( conifers ) bear "naked"
, typically on
, and include four phyla:
Cycadophyta,
Gingkophyta,
Gnetophyta,
and
Coniferophyta.
The gymnosperm
life
cycle shows a dominant
generation,
grains transferring
to ovules, and the development of
from fertilized
.
Megaspores develop into
which contain female
gametophytes.
Microspores develop into
grains which contain male
gametophytes.
When a pollen grain is transferred to the part of a plant containing the
, it can
germinate
and discharge
into the female gametophyte within the ovule.
This process of
is called
and
results
in a
containing a sporophyte
.
The pollen eliminates the need to swim through water and allows for wide
by
.
Angiosperms
are seed plants that possess reproductive structures called
and
.
A
flower
is a specialized
with modified leaves.
A
Fruit
typically consists of a mature
with seeds. Fruits are adapted for seed
by
,
, or
animals
to new locations.
The angiosperm life
cycle
includes a
fertilization which produces a food-storing
in addition to the
.
Most angiosperms are
and
,
classified
by the number of
(seed leaves).
Review
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