angiosperms group 3: seed producing, vascular plants type 2: angiosperms (flowering plants) flower =...
TRANSCRIPT
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. Embryo2. 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?
1
2
3
45
Net-like veins
Monocot or Dicot?
1
2
3
4
5
6
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
• Three Life Span Types:
1. Annuals– 1 year: Seed grows…produce flowers & seeds…die
Seed grows in 2010
Plant grows during the spring & summer of 2010
Flower grows during autumn of 2010
Plant dies in winter 2010…but seeds will grow in 2011
Seed grows in 2011
Plant grows during the spring & summer of 2011
Flower grows during autumn of 2011
Plant dies in winter 2011
Angiosperm Life Spans
• Three Life Span Types:
2. Biennials– 1st year: Seed grows and stores food
– 2nd year: grows more, makes flowers & seeds…dies
Seed grows in 2010
Plants grows during spring & summer of 2010
Plant goes dormant during winter of 2010
Plant grows during spring & summer of 2011
Flower & seeds created during autumn of 2011
Plant dies in winter of 2011…but seeds grow next year
Angiosperm Life Spans
• Three Life Span Types:
3. Perennials– Live for more than 2 years
Seed grows in 2010
Plant grows during spring & summer of 2010
Flower & seed grows during autumn of 2010
Plant goes dormant during winter of 2010
Plant grows during spring & summer of 2011
Flower & seed grows during autumn of 2011
Plant goes dormant during winter of 2011
Plant grows during spring & summer of 2012
Flower & seed grows during autumn of 2012
Plant goes dormant during winter of 2012
Plant grows during spring & summer of 2013
Flower & seed grows during autumn of 2013
Plant goes dormant during winter of 2013
Plant dies in winter of 2013
sepals
petals
• 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
Flowers
Tulip Pistil and Stamen
male
female
Lily Pistil and Stamen
male
female
Pistil and Stamen
male
female
Pistil and Stamen
male
female
Flowers • Female Carpel– Inner most part
– Ovary: within the base
• Female gametophyte
• Becomes the fruit when fertilized
– Stigma: sticky tip, collects pollen
• Male Stamen– Anther: produces
pollen
– 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….
Pollen nucleus travels down pollen tube to fertilize the egg
egg
.
zygote
Flower petals start to fall off and dies….
Fruit develops
zygote
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.
Tulip Pistil and Stamen
male
female
Lily Pistil and Stamen
male
female
Pistil and Stamen
male
female
Pistil and Stamen
male
female
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.