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Big Idea 16 Heredity and Reproduction. 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.

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Big Idea 16 Heredity and Reproduction

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Big idea 16 heredity and reproduction

Big Idea 16

Heredity and Reproduction

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

Mary Tweedy, Curriculum Support Specialist

Keisha Kidd, Curriculum Support Specialist

Millard Lightburn, District Supervisor

Department of Mathematics and Science

Office of Academics and Transformation


Big idea 16 heredity and reproduction

Sexual Reproduction in Flowering Plants

  • SC.4.L.16.1 - 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.14.1 - Describe structures in plants and their roles in food production, support, water and nutrient transport, and reproduction.


Schoolyard field study observing a wild flower

Schoolyard Field Study: 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.


Big idea 16 heredity and reproduction

Purpose of a Flower

Are Flowers

More Than

Just Pretty?


Flower power

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.


Big idea 16 heredity and reproduction

The Parts of a Flower

  • What are the three main parts of

  • flowers?

    • petals

    • stamens

    • pistil


Big idea 16 heredity and reproduction

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.


Flowering plant reproduction

Flowering Plant Reproduction

  • Pistil

  • Ovary

  • Egg

  • Stamen

  • Pollen

  • Sperm

  • Pollination

  • Fertilization


The stamen male reproductive part of a flower

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

The Pistil:Female Reproductive Parts of a Flower

Stigma

Style

Ovary (carpel)

Eggs(ovules)


Flower power writing

Flower Power Writing

Why Do Plants Make Flowers?

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

  • Plant’s use or value


What is pollination gizmos flower pollination

What is Pollination? Gizmos:Flower Pollination

Pollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma.

  • 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.


Pollinators

Pollinators

  • Animals, wind, and water can all help in the transfer of pollen.

  • We call animals or insects that transfer pollen from plant to plant "pollinators ".

  • The flower type, shape, color, odor, nectar, and structure vary by the type of pollinator that visits them.


Big idea 16 heredity and reproduction

  • 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.


Big idea 16 heredity and reproduction

  • 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

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?


Big idea 16 heredity and reproduction

Major Stages of Life Cycles of Florida Plants and Animals

  • SC.4.L.16.1 - Identify processes of sexual reproduction in flowering plants, including pollination, fertilization (seed production), seed dispersal, and germination. (Assessed as SC.3.L.14.1. “Fair Game”) AA

  • SC.4.L.16.4 - 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


The animal s life cycle

The Animal’s 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

Life Stages of Insects

Incomplete Metamorphosis

Complete

Metamorphosis

(butterflies and moths)

a. Egg

b. Larva (caterpillar)

c. Pupa

d. Adult

(grasshoppers)

a. Egg

b. Nymph

c. Adult


Big idea 16 heredity and reproduction

The Butterfly Life Cycle

Complete Metamorphosis

Larvae

Egg

Pupal Stage

Adult Butterfly


Big idea 16 heredity and reproduction

The Grasshopper Life Cycle

Incomplete Metamorphosis

Nymph

Egg

Adult Grasshopper


Let s explore

Let’s Explore!


Gone to seed

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 seeds

Senses & Hand Lens

Sight - Looks

Touch - Feels

Hearing – Sounds when dropped

Odor – Smells

Qualitative Observations

Measurement Tools

Ruler

Tape measure

Balance

Gram mass pieces

QuantitativeObservations

Observing Seeds


Observing a seed

Observing a Seed

  • 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.

  • Get a wet bean seed to observe. Draw it and write down four or more properties including length and width.

  • Why is the wet seed larger?

  • Split it open and observe its parts. Draw and label its inside including the seed coat, cotyledon, and embryo.


Big idea 16 heredity and reproduction

Wet Bean

1st Lets make Dry Seed

Observations:

Length:

Width:

Mass:

Color:

Texture:

2nd Let’s explore …


Big idea 16 heredity and reproduction

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.


Big idea 16 heredity and reproduction

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

Ways Seeds are Carried Away from a Plant

  • Animal-carried

  • Animal-consumed

  • Water-borne

  • Wind-borne

  • Propelled


Seed germination

Seed Germination

What do seeds need to sprout?

  • Water

  • Oxygen

  • Proper temperature

  • Some require proper light


Seed germination1

Seed Germination

What are the variables that affect germination?

Test your ideas on the Gizmo: Germination.

www.explorelearning.com

What did we learn?

  • Water

  • Proper temperature

  • Some require proper light

  • Oxygen


Big idea 16 heredity and reproduction

Where are seeds found in flowering and non flowering plants?

Flowering Plants

Holds seeds inside of the flower which lie dormant, waiting to be planted in the ground.

Non-Flowering Plants

Seeds are made in their cone or spores instead of the flower.


Life cycle of flowering plants

Life Cycle of Flowering Plants

  • Reproduction

  • Seed

  • Seedling

  • Adult Plant

  • Flowers/Fruit

  • Seed Dispersal

  • Germination


Reproduction in non flowering plants

Reproduction in Non-Flowering Plants

  • Some plant produce spores.

  • Some plants produce cones that contain seeds.


Big idea 16 heredity and reproduction

Life Cycle of Flowering and Non-Flowering Plants


Life cycle of a plant

Life Cycle of a Plant


Big idea 16 heredity and reproduction

Remember…

When the small plant inside begins to grow, the seed germinates.

The young plant that grows from a seed is the seedling.

Seeds are scattered by planting, wind, water, and animals.


Let s review

Let’s Review!

  • 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

4. What do the roots do for a plant?

The roots hold a plant in place and takes in water and nutrients from the soil.

5. What does the stem do for a plant?

The stem holds up the plant and moves water and nutrients through it.


6 why does a plant need leaves

6. Why does a plant need leaves?

Leaves use sunlight, air, water, and nutrients to make food for the plant.

7. What do flowers do for plants?

Flowers make fruits that hold seeds. These seeds will make new plants.

8. How can seeds be scattered?

By planting, animals, water, and wind.


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