Presentation on theme: "Big Idea 16 Heredity and Reproduction Mary Tweedy, Curriculum Support Specialist Keisha Kidd, Curriculum Support Specialist Millard Lightburn, District."— Presentation transcript:
Big Idea 16 Heredity and Reproduction Mary Tweedy, Curriculum Support Specialist Keisha Kidd, Curriculum Support Specialist Millard Lightburn, District Supervisor Department of Mathematics and Science Office of Academics and Transformation Benchmark SC.4.L.16.1 Sexual Reproduction in Flowering Plants Pacing Guide Quarter 3: 02/24-03/07 Benchmark SC.4.L.16.4 Stages & Life Cycles of Florida Plants and Animals Pacing Guide Quarter 3: 03/10-03/20
SC.4.L Identify processes of sexual reproduction in flowering plants, including pollination, fertilization (seed production), seed dispersal, and germination. (Assessed as SC.3.L.14.1.) SC.3.L Describe structures in plants and their roles in food production, support, water and nutrient transport, and reproduction. Sexual Reproduction in Flowering Plants
Schoolyard Field Study: Observing a Wild Flower Observing a Wild Flower Materials: A partner, plastic knife, hand lens, paper towel, wild flower (weed) Procedures: Pick a small plant to observe with a partner. Dig it out of the ground carefully and shake off the dirt. Draw your plant and label the parts. Use a hand lens to observe each part and sketch observations. Use sensory words to describe the your plant. Be ready to share with the class.
Purpose of a Flower Are Flowers More Than Just Pretty?
Flower Power Essential Question: What are the parts of a flower and the function of each part? Learning Goals: Observe and identify flower parts. Reconstruct a flower model. Recognize the function of a flower, identifying the processes of reproduction including pollination, fertilization, seed dispersal, and germination.
The Parts of a Flower What are the three main parts of flowers? petals stamens pistil
The Parts of a Flower Sepals protect the bud until it opens. Petals attract insects. Stamens make pollen. Pistil contain the ovary which contains the ovules (eggs). When fertilized, ovules grow into fruits which contain seed.
The Stamen: Male Reproductive Part of a Flower Anther: Pollen grains (sperm cells) grow in the anther. Filament: This holds the anther.
The Pistil: Female Reproductive Parts of a Flower Stigma Style Ovary (carpel) Eggs (ovules)
Stories Must Include: Common & scientific name Description of the flower Explanation of the role of the flower in the life cycle of the plant Use or value of the plant Writing Assessment Rubric: Accuracy of information Creativity Use of vivid vocabulary Description of flower Plants use or value Flower Power Writing Why Do Plants Make Flowers?
PollinationPollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma.antherstigma Pollen lands on a female pistil, sperm cells move down to the ovary, fertilizing the egg cells. Fertilization combines DNA. The result is a seed with a tiny plant inside. The ovary grows into a fruit to protect the seeds. What is PollinationWhat is Pollination? Gizmos: Flower PollinationFlower Pollination
Pollinators Animals, wind, and water can all help in the transfer of pollen. Animalswindwater We call animals or insects that transfer pollen from plant to plant "pollinators ".pollinators The flower type, shape, color, odor, nectar, and structure vary by the type of pollinator that visits them.
Wind Pollination Some flowers, such as grasses, do not have brightly colored petals and nectar to attract insects. These flowers are pollinated by the wind.
Flowering plants use: the wind insects bats birds mammals to transfer pollen from the stamen (male) part of the flower to the stigma (female) part of the flower.
Check Point What is pollination? How do flowering plants depend on other living things in order to reproduce? Why are young plants like but not identical to their parents?
SC.4.L Identify processes of sexual reproduction in flowering plants, including pollination, fertilization (seed production), seed dispersal, and germination. (Assessed as SC.3.L Fair Game) AA SC.4.L Compare and contrast the major stages in the life cycles of Florida plants and animals, such as those that undergo incomplete and complete metamorphosis, and flowering and nonflowering seed-bearing plants. AA 17 Major Stages of Life Cycles of Florida Plants and Animals
The Animals Life Cycle Birth to Death 1. They are born (egg or embryo). 2. They grow (infant). 3. They develop into adults (adolescent). 4. Adults can reproduce (adult stages).
Life Stages of Insects Incomplete Metamorphosis (grasshoppers) a. Egg b. Nymph c. Adult Complete Metamorphosis (butterflies and moths) a. Egg b. Larva (caterpillar) c. Pupa d. Adult
Adult Butterfly Egg Pupal Stage Larvae The Butterfly Life Cycle Complete Metamorphosis
Adult Grasshopper Egg Nymph The Grasshopper Life Cycle Incomplete Metamorphosis
Gone to Seed Three main parts: 1. seed coat - a covering with two roles: - Protects new plant called embyro - Guards stored food called endosperm. 2. endosperm – stored food 3. embryo – The new plant with structures called seed leaves or cotyledons.
Observing a Seed 1.Observe the outside of a dry bean seed with a hand lens. Draw it and write down four or more properties including length and width. 2.Get a wet bean seed to observe. Draw it and write down four or more properties including length and width. 3.Why is the wet seed larger? 4.Split it open and observe its parts. Draw and label its inside including the seed coat, cotyledon, and embryo.
Wet Bean 1 st Lets make Dry Seed Observations: Length: Width: Mass: Color: Texture: 2nd Lets explore …
How do seeds get dispersed from a plant into the ground? Some seeds are hidden in the ground by animals such as squirrels as a winter store. Some seeds have hooks on them and cling to fur or clothes.
How do birds and animals help seed dispersal? Birds and animals eat the fruits and excrete the seeds away from the parent plant.
Ways Seeds are Carried Away from a Plant Animal-carried Animal-consumed Water-borne Wind-borne Propelled
Seed GerminationGermination Water Oxygen Proper temperature Some require proper light What do seeds need to sprout?seedssprout
Seed GerminationGermination What are the variables that affect germination? Test your ideas on the Gizmo: Germination. What did we learn? Water Proper temperature Some require proper light Oxygen
Holds seeds inside of the flower which lie dormant, waiting to be planted in the ground. Seeds are made in their cone or spores instead of the flower. Flowering Plants Non-Flowering Plants Where are seeds found in flowering and non flowering plants?
Life Cycle of Flowering Plants Reproduction Seed Seedling Adult Plant Flowers/Fruit Seed Dispersal Germination
Reproduction in Non-Flowering Plants Some plant produce spores. Some plants produce cones that contain seeds.
Life Cycle of Flowering and Non-Flowering Plants
Life Cycle of a Plant
Seeds are scattered by planting, wind, water, and animals. When the small plant inside begins to grow, the seed germinates. The young plant that grows from a seed is the seedling. Remember…
Lets Review! 1.What do all living things need to live and grow? food, water and air 2. Can you name the parts of a plant? roots, stem, leaves and flower 3. What do plants need to grow? sunlight, air, water and nutrients or minerals from the soil
4. What do the roots do for a plant? 5. What does the stem do for a plant? The stem holds up the plant and moves water and nutrients through it. The roots hold a plant in place and takes in water and nutrients from the soil.
6. Why does a plant need leaves? Leaves use sunlight, air, water, and nutrients to make food for the plant. Flowers make fruits that hold seeds. These seeds will make new plants. 7. What do flowers do for plants? 8. How can seeds be scattered? By planting, animals, water, and wind.