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: Based on seed type Cotyledon: embryonic leaf Two Categories: –Monocots: embryo with 1 seed leaf –Dicots: embryo with 2 seed leaves

Monocots vs. Dicots Know this one ehh Know this one ehh

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 –Seed grows… –Produce flowers & seeds… –Die 2) Biennials –1 st year: Seed grows and stores food –2 nd year: grows more… makes flowers & seeds… dies 3) Perennials –Live for more than 2 years –May take decades to grow fruit

sepals petals Reproductive structure of angiosperms Sepals –o–outer ring of leaves –p–protection Petals –I–Inner ring of leaves –B–Brightly colored to attract pollinators Male and female organs found inside Flowers

Tulip Pistil and Stamen male female

Lily Pistil and Stamen male female

Pistil and Stamen male female

Pistil and Stamen male female

Flowers Male Stamen –Anther: produces pollen Female Carpel/Pistil –Inner most part –Ovary: within the base Contains eggs Grows into fruit when fertilized –Stigma: sticky tip, collects pollen

... Self-Pollination (own pollen fertilizes own egg)

Cross-Pollination (pollen of one, fertilizes egg of another)...

Angiosperm Life Cycle Here is an apple tree….lets zoom into an individual flower. 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary.

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary. 5) Nucleus travels down pollen tube to fertilize egg.

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary. 5) Nucleus travels down pollen tube to fertilize egg. 6) Zygote hardens into seed…flower starts to die seed ovary

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides) ovary

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides)

Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides)

seed A few hours later…

Seedling begins to grow…

Years later….

HW: Bring a flower and leaf 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.