Students

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Students Grades posted on white board
highlights are not good Test info Avg 30.5,
range 17 48 Corrections due Monday Brief
syllabus Plants next Ch 29 - 30, 10
(photosynthesis), 35 39 Photosynthesis lab
next week Tornado drill today 2nd
period Transport Friday tomorrow AP exam
payment???
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Chapter 29 Bryophytes Ferns

• What adaptations do plants have for survival on
  land?
• Stomata pores used for gas exchange
• Roots absorb water minerals from underground
• Apical meristems tips of shoots roots where
  growth occurs
• Cuticle waxy covering to prevent water loss
  thru leaves
• Jacketed gametangia gamete producing organ with
  protective
• jacket of cells to prevent dehydration
• - Sporopollenin polymer that formed around
  exposed zygotes forms
• walls of plant spores preventing dehydration
• Lignin structural polymer that provides
  strength for woody tissues

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Chapter 29 Bryophytes Ferns

• What adaptations do plants have for survival on
  land?
• What were the adaptations/highlights of plant
  evolution?
• Movement to land led to Bryophytes (mosses
  worts)
• Tougher spores (sporopollenin)
• Jacketed gametangia
• Vascular tissue (ferns)
• Cells joined to transport water nutrients
• Lacked seeds
• Development of seeds (Gymnosperms)
• More protection of embryo
• Embryo w/ food
• Development of flowers (Angiosperms)
• Complex reproductive structure

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Figure 29.7 Highlights of plant evolution
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Chapter 29 Bryophytes Ferns

• What adaptations do plants have for survival on
  land?
• What were the adaptations/highlights of plant
  evolution?
• Movement to land led to Bryophytes (mosses
  worts)
• Tougher spores (sporopollenin)
• Jacketed gametangia
• Vascular tissue (ferns)
• Cells joined to transport water nutrients
• Lacked seeds
• Development of seeds (Gymnosperms)
• More protection of embryo
• Embryo w/ food
• Development of flowers (Angiosperms)
• Complex reproductive structure
• What are bryophytes?
• Non-vascular plants
• Mosses worts
• Dominant life stage is haploid gametophyte
• Reproductive structures
• Male antheridia produce flagellated sperm

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Figure 29.8 The life cycle of a Polytrichum moss
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Figure 29.8 The life cycle of a Polytrichum moss
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Figure 29.8 The life cycle of a Polytrichum moss
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Figure 29.9 Bryophyte Diversity
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Info Plants divided into 2 units -Ch 29 - 30,
10, 35 test Friday, 3/16 -Ch 36 39 test
Monday 3/26 Transport today all day
430 All corrections due MONDAY AP Exam
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Figure 29.10 Sphagnum, or peat moss a bryophyte
with economic, ecological, and archaeological
significance
Covers 3 of land Stabilizes greenhouse effect
Closeup of Sphagnum. Note the leafy
gametophytes and their offspring, the sporophytes.
(b)
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Chapter 29 Bryophytes Ferns

• What adaptations do plants have for survival on
  land?
• What were the adaptations/highlights of plant
  evolution?
• What are bryophytes?
• What are the characteristics of ferns (seedless
  vascular plants)?
• Dominant life stage is sporophyte (2n)
• Gametophyte is reduced
• Sporophyte is branched
• Vasculature
• Xylem transports water minerals up from the
  ground
• Has tracheids tube-shaped cells for transport
• Dead at maturity
• Strengthened by lignin
• Phloem
• Transport sugars other organic products from
  leaves downward
• Living cells at maturity
• Roots - anchorage, water mineral transport
• Lets consider the life cycle..

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Figure 29.12 The life cycle of a fern
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Although this illustration shows an egg and
sperm from the same gametophyte, a variety of
mechanisms promote cross-fertilization between
gametophytes.
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The fern spore develops into a
small, photosynthetic gametophyte.
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Sporangia release spores. Most fern
species produce a single type of spore that gives
rise to a bisexual gametophyte.
Key
Haploid (n)
Diploid (2n)
Antheridium
Young gametophyte
Spore
MEIOSIS
Sporangium
Sperm
Archegonium
Egg
Mature sporophyte
New sporophyte
Zygote
Sporangium
FERTILIZATION
Sorus
On the underside of the sporophytes reprodu
ctive leaves are spots called sori. Each sorus is
a cluster of sporangia.
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Fern sperm use flagella to swim from the
antheridia to eggs in the archegonia.
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Gametophyte
A zygote develops into a new sporophyte,
and the young plant grows out from an
archegonium of its parent, the gametophyte.
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Fiddlehead
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Chapter 29 Bryophytes Ferns

• What adaptations do plants have for survival on
  land?
• What were the adaptations/highlights of plant
  evolution?
• What are bryophytes?
• What are the characteristics of ferns (seedless
  vascular plants)?
• What is the difference between homosporous
  heterosporous plants?

Most ferns
All seed plants few seedless plants
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Figure 29.14 Seedless Vascular Plant Diversity