Transcript Big Idea 16 - Flowering Plant Reproduction and Life Cycle

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
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.
2
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.
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
Parts of a Flower
• Pistil
• Ovary
• Egg
• Stamen
• Pollen
• Sperm
• Pollination
• Fertilization
The Stamen:
Male Reproductive Part
of a Flower
Anther:
pollen grains
(sperm cells) grow
in the anther.
Filament:
holds the anther
The Pistil:
Female Reproductive
Parts of a Flower
Stigma
Style
Ovary (carpel)
Eggs(ovules)
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.
Flower Power
Writing
Why Do Plants Make Flowers?
Stories Must Include:
Writing Assessment Rubric:
• Common & scientific name • Accuracy of information
• Description of the flower
• Creativity
• Explanation of the role of the • Use of vivid vocabulary
flower in the life cycle of the • Description of flower
plant
• Plant’s use or value
• Use or value of the plant
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
• 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.
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?
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.) 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
18
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
Incomplete
Metamorphosis
Complete
Metamorphosis
(grasshoppers)
(butterflies and moths)
a. Egg
b. Nymph
c. Adult
a. Egg
b. Larva (caterpillar)
c. Pupa
d. Adult
The Butterfly Life Cycle
Complete Metamorphosis
Larvae
Egg
Adult Butterfly
Pupal Stage
The Grasshopper Life Cycle
Incomplete Metamorphosis
Nymph
Egg
Adult
Grasshopper
Let’s 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 Germination
What do seeds need to sprout?
•
•
•
•
Water
Oxygen
Proper temperature
Some require proper light
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
•
•
•
•
•
•
•
Reproduction
Seed
Seedling
Adult Plant
Flowers/Fruit
Seed Dispersal
Germination
Life Cycle of Flowering Plants
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
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!
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?
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?
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