Angiosperms

Group 3: Seed producing, Vascular Plants Type 2: Angiosperms (flowering plants) Flower = reproductive structure –A–Attract animals to help spread pollen –F–Forms fruit to protect and spread seeds Seeds –G–Grow inside the fruit –I–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

Apple Tree: Monocot or Dicot? Net-like veins

Monocot or Dicot?

Veins run parallel

Veins run parallel

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 –1 st year: Seed grows and stores food –2 nd 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 –o–outer ring of leaves –p–protection Petals –I–Inner ring of leaves –B–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 –I–Inner most part –O–Ovary: within the base Female gametophyte Becomes the fruit when fertilized –S–Stigma: sticky tip, collects pollen Male Stamen –A–Anther: produces pollen –P–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. zygo te

Flower petals start to fall off and dies…. Fruit develops

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.