1. 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
Quarter 3: 03/10-03/20
Engage: Read aloud Flowers: More Than Just Pretty . Discuss what we can do to find out the answer.
Mary Tweedy, Curriculum Support Specialist
Keisha Kidd, Curriculum Support Specialist
Millard Lightburn, District Supervisor
Department of Mathematics and Science
Office of Academics and Transformation

2. Sexual Reproduction in Flowering Plants
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.  

3. 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.
Explain: Gr. 4 SF pp : What are the parts of plants?

4. Purpose of a Flower Are Flowers More Than Just Pretty?
Engage: Read aloud Flowers: More Than Just Pretty . Discuss what we can do to find out the answer.

5. 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.

6. The Parts of a Flower What are the three main parts of flowers? petals
stamens
pistil
Explain: Gr. 4 SF pp Parts of a Flower View Love Me, Love me not to see parts of the flower.

7. Parts of a Flower

8. Flowering Plant Reproduction
Pistil
Ovary
Egg
Stamen
Pollen
Sperm
Pollination
Fertilization

9. The Stamen: Male Reproductive Part of a Flower
Anther:
pollen grains (sperm cells) grow in the anther.
Filament:
holds the anther

10. The Pistil: Female Reproductive Parts of a Flower
Stigma
Style
Ovary (carpel)
Eggs(ovules)

11. 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.

12. Why Do Plants Make Flowers?
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

13. 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.
Explain: Gr. 4 SF pp Pollen on the Move

14. 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.

15. 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.

16. 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.
View video to see View of Attraction for pollinators.

17. 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?
Explain for review: Students make the foldable – Plant Reproduction.

18. Major Stages of Life Cycles of Florida Plants and Animals
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.) 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

19. 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).

20. Incomplete Metamorphosis
Life Stages of Insects
Incomplete Metamorphosis
Complete
Metamorphosis
(grasshoppers)
a. Egg
b. Nymph
c. Adult
(butterflies and moths)
a. Egg
b. Larva (caterpillar)
c. Pupa
d. Adult

21. The Butterfly Life Cycle
Complete Metamorphosis
Larvae
So we have talked about the reproduction and life cycle of plants, let’s jump to the life cycle of animals, specifically the butterfly and the frog, both of whom have unique life cycles because they go through complete metamorphosis. The first stage of the butterfly life cycle is the egg. When the egg hatches, the larvae or the caterpillar is revealed. The caterpillar eats the leaves where the egg was attached to get its nutrients to grow and develop. Caterpillars shed their outgrown skin several times during the growth process. Once the caterpillar has grown fully, they change into a pupa also called a chrysalis. The pupal stage in the development of the caterpillar is where major transformations take place. Lastly, when the caterpillar is done with its metamorphosis inside the pupa, an adult butterfly will emerge.  Then the female butterfly reproduces and lays her eggs on the leaves of choice. The butterfly life cycle starts all over again
Egg
Adult Butterfly
Pupal Stage

22. The Grasshopper Life Cycle
Incomplete Metamorphosis
Egg
Nymph
Adult Grasshopper

23. Let’s Explore!

24. 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.

25. How do birds and animals help seed dispersal?
Birds and animals eat the fruits and excrete the seeds away from the parent plant.

26. Ways Seeds are Carried Away from a Plant
Animal-carried
Animal-consumed
Water-borne
Wind-borne
Propelled
Take students on a seed scavenger hunt around the schoolyard.

27. What do seeds need to sprout?
Seed Germination
What do seeds need to sprout?
Water
Oxygen
Proper temperature
Some require proper light
How do we know?

28. Seed Germination 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
Click on Germination to learn more about variables that affect germination.
Students can also do the GIZMO: Germination.

29. Life Cycle of Flowering Plants
Reproduction
Seed
Seedling
Adult Plant
Flowers/Fruit
Seed Dispersal
Germination
Life Cycle of Flowering Plants

30. Life Cycle of Flowering Plants
Let’s see if you can identify the function of each of the following flower parts. (Have students identify the function of each flower part.)

31. Reproduction in Non-Flowering Plants
Some plant produce spores.
Some plants produce cones that contain seeds.

32. Seeds are made in their cone or spores instead of the flower.
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.
Pine trees, ferns, and mosses are examples of non-flowering, cone bearing-plants. These plants differ from flowering plants in that their seeds are made in their cone or spores instead of the flower.

33. Life Cycle of Flowering and Non-Flowering Plants
Flowering plants hold seeds inside which lie dormant, waiting to be planted in the ground. Once the seed is planted, the seed germinates and the tiny roots begin to grow downward while the stems grow upward. Next, the seedling reveals a small stem with a few tiny leaves. The plant begins to grow until maturity. Once a plant reaches maturity it will grow flowers. The flowers will attract pollinators. The egg cells will become fertilized and a new seed will be produced. The process will then begin all over again.

34. The
Life Cycle
of a Plant

35. Life Cycle of a Plant

36. 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.

37. 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

38. 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.

39. 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, wind