OMM Lesson 9 Sexual Reproduction in Flowering Plants

Question: What purpose do flowers serve?

Hypothesis: “I believe flowers serve as…because….”

Procedure:  pages

Data - Inquiry 9.1   Trace and label the picture on page 108   Drawing #1 – “XXX – A Perfect Flower”   Drawing #2 – “Male Reproductive Structure – The Stamen”   Drawing #3 – 3 Pollen Grains   Drawing #4 – “XXX – Ovule”

Data Analysis:   Why do you think some flowers have so many pollen grains and ovules?   Using “The Wonder of Flowering Plants”, create a timeline of the events that happen starting with pollination and ending with fruit/seed production. (hint: there are about 6 steps)

Conclusion:  Go back and answer our original question.

Inquiry 9.2 Pollination  Procedure on p 111  Pollinate your set of Wisconsin Fast Plants by moving pollen from the anthers to the stigma.  Keep the “pollinator”  Repeat the pollinating process for about one week

Lesson 9 Word Wall  Runners  Budding  Bulbs  Cuttings  Asexual reproduction  Sexual reproduction  Anther  Cross-pollinate  Diploid  Stigma  Fertilization  Haploid  Perfect Flower  Imperfect Flower  Meiosis  Ovary  Ovule  Pollen  Pollination  Self-pollinate

AntherMeiosis Asexual reproduction Ovary BuddingOvule Bulbs Perfect Flower Cross-pollinatePollen CuttingsPollination DiploidRunners FertilizationSelf-pollinate Haploid Sexual reproduction Imperfect Flower Stigma

Lesson 9 Word Wall  Runners – Asexual reproduction found in strawberries  Budding – Asexual reproduction found in Hydra and yeast  Bulbs – Asexual reproduction found in tulips. Bulbs can be split and replanted  Cuttings – Asexual reproduction which grows a new plant from a twig or limb placed in soil or water  Asexual reproduction – formation of new individuals from 1 parent, without the union of male and female sex cells

 Sexual reproduction – new organisms are formed by the union of both male and female sex cells  Anther – male – produces the pollen  Cross-pollinate – pollen moves from one plant to another plant  Diploid – cells contain the full set of chromosomes (body cells = 46 in humans)  Stigma – female – sticky top of the pistil

 Fertilization – the union of the male sperm (pollen in plants) and the female egg (ovule in plants)  Haploid – a cell that contains only half the normal number of chromosomes (sex cells – sperm/egg = 23 in humans)  Perfect Flower – a flower that has both the male and female reproductive structures (pistil and stamen)  Imperfect Flower – a flower that only has the male or female reproductive structure

 Meiosis – the process responsible for sex cell creation. It turns 1 diploid cell into 4 haploid cells.  Ovary – female – produces the eggs (ovules)  Ovule – female - eggs  Pollen – male - sperm  Pollination – pollen from an anther comes in contact with the sticky stigma of a pistil  Self-pollinate – when pollen is transferred to the stigma of a flower on the same plant