Transcript Angiosperms Group 3

Angiosperms
Group 3: Seed producing, Vascular Plants
• Type 2: Angiosperms
(flowering plants)
• Flower = reproductive
structure
– Attract animals to help
spread pollen
– Forms fruit to protect
and spread seeds
• Seeds
– Grow inside the fruit
– Inside the seed
1. Embryo
2. Food supply
Seed Dispersal
• Fruit brightly colored
– Attracts animals
• Seeds pass through animals
digestive system
• Seeds pooped in a new area
to grow
Fruit seeds in fox poop
Angiosperm Groups
• 2 groups: Monocots and Dicots (based on seed type)
• Cotyledon: embryonic leaf
• Two Categories:
– Monocots: embryo with 1 seed leaf
– Dicots: embryo with 2 seed leaves
Monocots vs. Dicots
Easy to see
Easy to see
Apple Tree: Monocot or Dicot?
2
3
1
Net-like
veins
4
5
Monocot or Dicot?
2
3
1
4
6
5
Monocot or Dicot?
Monocot or Dicot?
Monocot or Dicot?
Veins run
parallel
Monocot or Dicot?
Veins run
parallel
Monocot or Dicot?
Veins
branch
outward
Angiosperm Life Spans
Seed grows in 2011
Seed grows in 2010
Plant dies in
winter
2010…but
seeds will grow
in 2011
Plant dies in
winter 2011
Plant grows
during the
spring &
summer of 2011
Plant grows
during the
spring &
summer of 2010
Flower grows
during autumn
of 2010
• Three Life Span Types:
1. Annuals
Flower grows
during autumn
of 2011
– 1 year: Seed grows…produce flowers & seeds…die
Angiosperm Life Spans
Seed grows in 2010
Plant dies in winter of 2011…but
seeds grow next year
Plants grows during spring &
summer of 2010
Flower & seeds created
during autumn of 2011
Plant goes dormant
during winter of 2010
Plant grows during spring &
summer of 2011
• Three Life Span Types:
2. Biennials
– 1st year: Seed grows and stores food
– 2nd year: grows more, makes flowers & seeds…dies
Angiosperm Life Spans
Seed grows in 2010
Plant dies in winter of
2013
Plant goes dormant during
2010
2011
winter of 2013
2012
• Three Life Span Types:
3. Perennials
– Live for more than 2 years
Plant grows during spring &
summer of 2013
2010
2011
2012
Flower & seed grows
during autumn of 2013
2011
2012
2010
Flowers
petals
sepals
• Reproductive structure
of flowering plants
• Sepals
– outer ring of leaves
– protection
• Petals
– Inner ring of leaves
– Brightly colored to
attract pollinators
• Open petals & sepals
reveal male and female
structures
Tulip Pistil and Stamen
female
male
Lily Pistil and Stamen
female
male
Pistil and Stamen
female
male
Pistil and Stamen
female
male
Flowers
• Female Carpel
– Inner most part
– Ovary: within the
base (female
gametophyte)
– Stigma: sticky tip,
collects pollen
• Male Stamen
– Surrounds carpel
– Anther: produces
pollen (male
gametophyte)
Self-Pollination
(own pollen fertilizes own egg)
.. .
Cross-Pollination
(pollen of one, fertilizes egg of another)
..
Angiosperm Life Cycle
Pollen stick to animal or released into wind
Insect finds a new flower to feed on
Pollen transferred to the stigma….
Pollen tube grows towards the egg….
Nucleus travels down pollen tube to fertilize the egg
.
zygo
egg
te
Flower petals start to fall off and dies….
Fruit develops
zygo
te
Fruit falls to ground
Animals eat fruit….seeds come out the other end…cycle repeats
seed
HW: Bring a flower to school. One
with distinct male and female parts.
End of the Semester!
Kobe Kuiz
1) What is the reproductive structure of angiosperms
called?
2) What structure protects the seeds of angiosperms?
3) Why are flowers and fruits often brightly colored?
4) Be able to identify the parts of a flower diagram.
5) Which flower part produces pollen?
6) Which flower part will pollen land upon?
7) Which flowers only live for 2 years and then die?
8) Practice the monocot/dicot sample questions.