1. Flower Structure and Function
Flowering plants are called ANGIOSPERMS.
They are the greatest number of plants on Earth.
What helps them survive?
Diversity !
What is diversity?
Diversity
is variation
within a community.

2. Take in CO2, make glucose, release O2.
Main Plant Parts
Angiosperms are made up of 6 parts:
1. Roots--
Stabilizes the plant below ground, absorbs water and nutrients from the soil.
Fibrous root system--
Trees
Tap root system--
Cactus, Carrots
2. Stems--
Stabilizes the plant above ground and allows plant to grow higher and wider.
Woody stems--
Trees, Roses
Herbaceous stems--
Grass, Flowers
3. Leaves--
Act as food factories of the plant.
Take in CO2, make glucose, release O2.
Waxy coat to prevent water loss--
Cuticle

3. 4. Flowers-- 5. Seeds-- 6. Fruit-- Contain angiosperms
reproductive parts.
5. Seeds--
Part of flowering plant that
contains an
embryo (young plant)
and the food (cotyledon)
it will need to grow into
a new plant.
6. Fruit--
Ripened ovary of a flowering plant that contains the seeds. Can be dry or fleshy

4. Reproduction in Angiosperms
Flowers are the reproductive structures of angiosperms.
Some have male reproductive parts
Others have female reproductive parts
Some have both--
male & female parts
MALE FLOWER PARTS
Anther
STAMEN
Filament
POLLEN--
Powder containing male sperm

5. PISTIL FEMALE FLOWER PARTS Stigma Style Ovary
Sticky, pollen lands here
Style
Ovary
Hollow structure at bottom of pistil,
contains female egg cell.

6. Flower Parts
M = Male
F = Female N F M F
Male M M F
EGG F F N F

7. Pollination
Process of getting pollen (sperm) of a plant to the egg—may be the same plant/may be another plant.
Things that attract pollinators:
Color
Aroma (Smell)
Shape
Size
Pollinators:
Organisms that carry pollen
from stamens to pistils.
Examples: insects, like honeybees,
butterflies, moths, birds,
and mammals, like bats.

9. How Does Pollination Occur?
Flowers provide food
NECTAR
Pollen then "sticks" pollinator
Pollinator moves to feed on
another flower, pollen grains fall off
animal's body onto pistil of
visited flower.
Flowers have different colors,
shapes, sizes, and fragrances to
attract different pollinators.
Examples:
Butterflies--long, slender tongues to
pollinate long, narrow flowers.
Bees--open, shallow flowers

10. Inside the fruit--the seeds
Fertilization
Pollen travels down—thru the style into the ovary to fertilize female egg.
EMBRYO
fertilized egg--
embryo--
SEED
Ripened Ovary develops into a
FRUIT
Fruit protects newly
fertilized egg.
Inside the fruit--the seeds
that can develop into
new plants.
Some fruits—1 seed--peaches
Others—Many seeds--apples

11. Parts of a seed Embryo Cotyledon (Stores Food) Seed Coat
Tiny Young Plant
Cotyledon (Stores Food)
Seed Coat

12. How are seeds sent out or dispersed
Seed Dispersal
How are seeds sent out or dispersed
into the environment?
Animals, water, wind,
hooks on certain
seeds (cuckleburr)
How do angiosperms and
animals help one
another?
Seed lands—conditions right--
GERMINATION
Sprouting

13. Are those fruits or veggies?
Foods we call vegetables are
actually fruits: tomatoes,
cucumbers, squash, zucchini, and peppers.
Why???

14. Number 1-8 somewhere on your notes!!
Quiz Time !!!!!!!!
How well did you listen and take notes?
Number 1-8 somewhere on your notes!!

15. 1. Which of these is a male part of the flowering plant?
A. Stomata B. Stamen
C. Ovary D. Pistil
2. A new plant inside a seed is called
A. an embryo. B. A pistil.
C. a cotyledon. D. an ovary.
3. Which of these plant parts develop into a fruit?
A. pistil B. ovary
C. flower D. seed

16. 5. Which plant structure is NOT involved in sexual reproduction?
4. Roots that grow underground are important for a plant's survival. Which statement best describes their job?
A. They absorb water and nutrients
B. They produce food.
C. They contain the seeds for reproduction.
D. They work to scare off underground predators.
5. Which plant structure is NOT involved in
sexual reproduction?
A. Ovary B. Pistil
C. Stamen D. Stem

17. 6. Some leaves and fruit possess a waxy coat
6. Some leaves and fruit possess a waxy coat. What is most likely the purpose of this coating?
A. It traps insects B. It traps sunlight
C. It prevents water loss D. It looks shiny
7. Milkweed is a plant that secretes a milky substance poisonous to insects. What is the most likely advantage of this characteristic?
A. Reproduction B. Respiration
C. Defense D. Photosynthesis

18. 8. Pollinators, such as birds and insects, are very important to flowering plants. What is the most important job that
they perform?
1. They bring food to the plant.
2. They scare off predators.
3. They bring water to the plant.
4. They help plants reproduce.