reproduction in plants and animals by: brianna shields may 7, 2005

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



• 3. Male organ = Stamen– makes pollen (sperm cells)



• 4. Female Organ = Pistil-(center)

– Ovary- at bottom

– Fertilization



• 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 ReproductionIllustrate this process in your notes


• 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



• 8. Seed– Made up of embryo, cotyledon,

coat



• 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



• “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



• 2. Cuttings- use leaf or stem cut from plant to grow a new one



• 3. Grafting- transplant a cutting onto a different plant

– Ex: apple trees



• 4. Bulbs & Tubers- fat stems/roots that grown new plants underground

– Ex: onion, potatoes



• 5. Spores- small round reproductive cells underneath fern leaf (drop to ground)

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Assessment: Plant Reproduction

• Compare and contrast sexual and asexual plant reproduction


• Distinguish between the roles of the “female” and “male” plant organs in sexual 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)


• List the ways in which flowers become fertilized /pollinated


• 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

reproduction in plants and animals by: brianna shields may 7, 2005

Documents

pistil slide

stamen slide

embryo slide

fertilization slide

ivy slide

coat slide

seuss slide

notes sexual reproduction