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BELLWORK:Write the correct tropism to each scenario.
1. You place a lily plant in your windowsill to observe the movement of the flower. 2. The roots of a rosebush absorb the moisture provided by the rain.3. A vine uses the nearby fence to latch onto.4. As a seed begins to germinate, the roots grow downward and the stem grow upward.
HAPPY THURSDAY
Gravitropism
Phototropism
ThigmotropismHydrotropism
Plant Notecards4th and 5th Periods
Due Friday (3/9/15)
1. Anther2. Cellular
Respiration3. Filament4. Flower5. Germination6. Glucose7. Gravitropism8. Hydrotropism9. Leaf10. Ovary11. Petal
12. Phloem13. Photosynthesis14. Phototropism15. Pistil16. Pollen17. Pollination18. Roots19. Sepal20. Stamen21. Stem22. Stigma23. Stoma
24. Style25. Thigmotropism26. Transpiration27. Xylem
-Extra Credit**Due tomorrow**
Only here till 3:30pm
Anticipation Guide:Decide if the following statements are
true or false with your partner1. Some plants are single celled organisms2. Plants are prokaryotic and animals are
eukaryotic3. Plants are photosynthetic autotrophs4. Plants have chitin in their cell walls5. Pollination is a part of plant reproduction6. There are carnivorous plants
PlantsWhat makes a plant a
plant?
Plants are eukaryoticPlants have cell walls made of cellulosePlants make their own energy through photosynthesis
Plants are multicellular
What plants need to survive…
1. Sunlight
2. Water
3. CO2 & Oxygen
On today’s notes, you will divide them into 6 sections.
You will write the bold, red for each section only.
Essential Question: How do the different parts of the plant work together
to reproduce?
Standard: Describe the interactions that occur among systems that perform the functions of
transport, reproduction, and response in plants. (B10B)
Plant Parts/Systems• Reproductive System =
Flower (with male and female parts)
• Transport System = tissues in stem
• Nutrient System = Leaf + Root
• Structural Support System = Stem + Roots
All of these parts and systems work together to help a plant maintain homeostasis.
Plant Reproduction Outline
Flower structure
Pollination
Fruit
Seed dispersal
Germination
Reproduction withoutFlowers
1
2
3
4
5
6
1. Flower Structure• Flowers are the reproductive organs of plants• Have male and female parts
Male Reproductive StructureThe stamen
consists of two parts: Anther and Filament
Anther = produces pollen
A = AntherF = Filament
Female Reproductive StructureThe (sticky) stigma
receives the pollen from the anther
The pollen grows a tube down through the style
Meiosis occurs in the ovary to produce ovules
J = StigmaK = StyleL = OvaryO = Ovule
Pollination
The pollen grain contains the male gamete
So, this is what sexual
reproduction in plants looks
like...awkward
How does the pollen get to the stigma?
2. Pollination: the transfer of pollen from the anther to the stigma
Cross-pollination: pollen travels from one flower to another. **This is desirable in plants as it promotes genetic variation.
Click to view the animation
What OR who is responsible for getting pollen to the stigma?
Wind: Dull, scentless flowers with reduced petals
Bees/Butterfly: Bright color, nectar, scent. They sip nectar, get pollen on coats, transfer pollen from flower to flower
Bird: Nectaries, brightcolors, tube-like flowers
Moth: White petals, open at night
Fly: Rank odor, fleshcolored petals
Forms of Pollination:
Self-pollination occurs when pollen falls from the anther onto the stigma of the same flower
Self-pollination is not desirable as it reduces genetic variation
3. Fruit
Once pollination occurs a tube grows from the pollen grain down through the style to the ovule
stigma
style
ovary
ovule
carpel
Note: Petals not shown in order to simplify diagram
Click to view the animation
Fertilization: occurs when the pollen (male gamete) fuses with the ovule (the female gamete) **SEXUAL REPRODUCTION**
Click to view the animation
Then we get…Fruit!
Ovary “ripens” into a fruit (using hormones)
Ovule develops into a seed
Flower to Fruit
4. Seed Dispersal
Seed Dispersal Mechanisms =
1. Wind- Flight mechanisms, like parachutes, wings, etc. Ex. Dandelion, maples, birch
2. Animal- Fleshy fruits which animals eat, drop undigested seeds in feces or burrs which stick to animals’ coats
3. Gravity- Heavy nuts fall to ground and rollex. acorns
5. Germination
Germination = when the plant begins to grow out of its seed coat
Seed coat = protects embryo and keeps seed from drying
6. Reproduction without flowers
• Mosses, ferns, and related plants have swimming sperm. The leafy tips of mosses produce male and female sex cells. Male sex cells swim through water on the surface of the plant to reach and fertilize female cells. Fertilization produces a spore capsule, that scatters spores into the air.
What kind of environmental conditions would be required for reproduction in these plants?
What kinds of limits does external reproduction impose on these plants?
Debrief:
How do the response system in plants (tropisms) and the reproductive systems in plants interact?
Hint…Think about the following pairs below for interactions!• Hydrotropism & seed germination• Phototropism & nutrients needed for the flower/fruit• Gravitropism & seed germination or plant growth• Thigmotropism & pollination mechanisms
WORK
TOGETHER
Plant Quiz
1. Where is pollen made?
stigma
sepal
anther
ovary
Plant Quiz
2. Where is the ovule found in a flower?
petals
style
nectary
ovary
Plant Quiz
3. Pollination is the transfer from….?
the stigma to anther
style to stamen
anther to stigma
ovule to filament
Plant Quiz
4. Cross-pollination…
Increases variation
Decreases variation
Is only performed by wind
Is only performed by insects
Plant Quiz
6. Flowers are adapted for animal-pollination by…
Having feathery stigmas
Having a nectary
Having bright petals and a scent
Having sticky stigmas
Plant Quiz
7. Which mechanism for dispersal is used by the seed shown in the picture
mechanical
wind
animal
water
Plant Quiz
8. Which mechanism for dispersal is used by the seed shown in the picture
mechanical
animal
wind
water