Reproduction in Plants and Animals BY: BRIANNA SHIELDS May 7, 2005

GET YOUR HOMEWORK OUT ON YOUR DESK Clear everything else off your desk, except for a pencil Get a textbook, paper towel, and a sheet of white computer paper off the front counter and bring them back to your seat (one per table) Each student should get a plant worksheet off the front counter Wait quietly for further instructions

1. Throw out the plant parts and sheet of blank paper 2. Put the textbook back on the front table 3. Have only the three note worksheets and a writing utensil out on your desk 4. Sit quietly and wait for instructions

Plants: Sexual Reproduction Sexual Reproduction in Plants 1. Flower = reproductive organ, makes gametes (sperm and egg) 2. Seed= Pollen (male) + egg cell (female) = baby plant

Plants: Sexual Reproduction Sexual Reproduction in Plants 3. Male organ = Stamen –makes pollen (sperm cells)

Plants: Sexual Reproduction Sexual Reproduction in Plants 4. Female Organ = Pistil- (center) –Ovary- at bottom –Fertilization

Plants: Sexual Reproduction Sexual Reproduction in Plants 5. Perfect flower = Has a pistil and a stamen 6. Imperfect flower= Has just a pistil or just a stamen

Comparing Perfect & Imperfect Flowers Makes only pollen Imperfect- with stamen Makes both pollen and eggs Perfect The only self-pollinator Perfect Cannot pollinate any flower Imperfect with pistil In which plants can fertilization take place? Perfect and imperfect with pistil

Plants: Sexual Reproduction Illustrate this process in your notes Sexual Reproduction in Plants 7. Fertilization –A. Pollination- pollen transferred from stamen to pistil (wind, animal (bee), gravity) –B. 2 Pollen grow down into pistil’s ovary –C. Pollen fertilizes egg cell- to make a baby plant embryo –D. Other pollen develops into food (cotyledon) for embryo

Plants: Sexual Reproduction Sexual Reproduction in Plants 8. Seed –Made up of embryo, cotyledon, coat

Plants: Sexual Reproduction Sexual Reproduction in Plants 9. Pollination –A. Self-pollination- gravity pulls pollen down from stamen to pistil –B. Wind –C. Insects- pollen sticks to them and travels with them to a new flower

Plants: Sexual Reproduction Sexual Reproduction in Plants “Oh Say Can You Seed” Book by Dr. Seuss

Plants: Asexual Reproduction “Vegetative Propagation” Asexual Reproduction in Plants 1. Runners- plant grows from an extension of a root or stem –Ex: ivy

Plants: Asexual Reproduction “Vegetative Propagation” Asexual Reproduction in Plants 2. Cuttings- use leaf or stem cut from plant to grow a new one

Plants: Asexual Reproduction “Vegetative Propagation” Asexual Reproduction in Plants 3. Grafting- transplant a cutting onto a different plant –Ex: apple trees

Plants: Asexual Reproduction “Vegetative Propagation” Asexual Reproduction in Plants 4. Bulbs & Tubers- fat stems/roots that grown new plants underground –Ex: onion, potatoes

Plants: Asexual Reproduction “Vegetative Propagation” Asexual Reproduction in Plants 5. Spores- small round reproductive cells underneath fern leaf (drop to ground)

Assessment: Plant Reproduction Compare and contrast sexual and asexual plant reproduction

Assessment: Plant Reproduction Distinguish between the roles of the “female” and “male” plant organs in sexual reproduction

Assessment: Plant Reproduction Describe the fertilization process in a flower Pollen lands on top, grows down into ovule and fertilizes it, producing an egg cell and endosperm (seed)

Assessment: Plant Reproduction List the ways in which flowers become fertilized /pollinated

Assessment: Plant Reproduction Distinguish between the various forms of vegetative propagation in plants

Assessment: Plant & Animal Reproduction Compare the gametes involved in sexual reproduction in plants vs. animals

Hand-On: Studying a Plant Complete the flower dissection lab

Plant Reproduction Websites Plants in Motion Tree of Life: Plants Plant Investigations The Great Plant Escape