Animations
Movies
Words
Appendix
Summary
Art
Art
Chapter
29
Quizzes:
Self
Activities
Chapter
Cum.
Unit 5: The Evolutionary History of Diversity
Plant Diversity I: How Plants Colonized Land
Review
Land plants (kingdom
) evolved from
algae,
and are most closely
related
to the
. Five innovations among the
Plantae
are:
Apical
in root and shoot systems.
Alternation
of
.
Walled
spores produced in
.
Multicellular
which produce gametes.
Multicellular,
dependent
.
Bryophytes
consist of three phyla of small
plants:
(Hepatophyta),
(Anthocerophyta), and
(
Bryophyta
).
The large
are
anchored
by
, and produce
which fuse to yield smaller
.
Sporophytes
produce haploid
which grow to become the
.
Male gametes are
flagellated
that
short distances to fertilize the
egg.
Vascular
plants evolved in the
period,
and have life cycles with
dominant
; their
spores develop into
bisexual
.
Vascular plants possess specialized
vascular
tissues called
and
.
Xylem
contains dead cells called
and
elements which carry
and minerals up from the
system through the
system.
Phloem
includes living cells arranged into tubes that distribute
and other organic products from the
.
Seedless vascular plants form two phyla.
Lycophyta
includes
mosses,
mosses, and
.
Pterophyta
includes
,
, and
ferns and their relatives.
Ancestors of modern
lycophytes,
horsetails,
and
ferns
grew to great heights during the
period that may have led to global
cooling.
Incomplete decomposition of organic matter from these forests eventually became
and other
fossil
fuels.
Review
Animations
Movies
Words
Appendix
Summary
Art
Art
Chapter
30
Quizzes:
Self
Activities
Chapter
Cum.
Unit 5: The Evolutionary History of Diversity
Plant Diversity II: The Evolution of Seed Plants
Review
Seed plants are
: different kinds of spores produce reduced male and female
. The
gametophytes
produce
protected in female
and male
grains.
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 two
into the female gametophyte within the ovule.
This process of
is called
and
results
in a
containing a sporophyte
, along with its food supply, packaged in a protective
derived from the integument.
The pollen eliminates the need to swim through water and allows for wide
by
or
animal
.
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
.
Angiosperms
are seed plants that possess reproductive structures called
and
.
A
flower
is a specialized shoot with modified leaves:
enclose the flower,
may be brightly colored to attract pollinators,
produce pollen, and
produce ovules.
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
.
Angiosperms have evolved many
relationships
with animals in
and
seed
. Seed plants provide a vast range of products from
and
to
many
.
Review
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Nov 23, 2006
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