Download Ferns

Exam #2 F 2/29 in class
Review Th 2/28 5pm in PAI 3.02
Plant
Evolution:
different
plants have
different
ploidy for
the different
parts of
their
lifecycle.
CB 29.7
CB 29.8 and .12
Haploid
dominant
(algae)
Diploid
dominant
(fern)
CB 29.7
CB tbl 29.1
Extant Terrestrial
Plants
Moss
CB 29.9
Extant early
terrestrial plants
Early terrestrial plants:
•Could not transport water over long distances
•Could not grow tall, lacked support
•Needed water for reproduction
Moss Life Cycle
CB 29.8
Moss Life Cycle:
water required
for reproduction
CB 29.8
CB 29.11
Early vascular plants
CB 29.14
Extant early vascular plants
CB 35.18
Plant vascular system:
Xylem- water…
(tough tubes, support)
Phloem- sugars…
Xylem- thick
cells walls
Xylem- thick
cells walls
Equisetum
Equisetum
Moss
CB 29.13
Early Leaves: fusion of branched stems
CB 29.1
Ferns
Fern life cycle
CB 29.15
Carnboniferous forest of ferns, etc. ~330 mya
(now coal)
Changes in atmospheric C02
CB 29.7
Seeds and pollen allowed gymnosperms to
reproduce without water
CB 30.4
Weird
Gymnosperms
CB 30.4
Conifers:
More common
Gymnosperms
Gymnosperms disperse their pollen and
seeds by wind
Note: this is not a gymnosperm
Gymnosperms disperse their pollen and
seeds by wind
CB tbl 29.1
Extant Terrestrial
Plants
Flowering
Plants =
250,000 species
Angiosperms- flowering plants
The flower allowed angiosperms to direct
pollen movement from one plant to another
CB 30.7
a typical
flower
CB 30.13
Animal pollinators move pollen from one plant
to another
CB 30.13
Plants reproduce, reward animals with sugar
http://plantsinmotion.bio.indiana.edu/plantmotion/flowers/flower.html
CB 30.9
Seed dispersal
can be by
wind or often
also by
animal
CB 30.8
Fruits:
Animals can
get nutrients
to disperse
seeds
CB 30.10
Angiosperm
reproduction
Exam #2 F 2/29 in class
Review Th 2/28 5pm in PAI 3.02