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Flower Structure and Flower Structure and FunctionFunction
Flowering plants are called Flowering plants are called ANGIOSPERMS.ANGIOSPERMS.
They are the greatest number of plants on
Earth.What helps them survive?
Diversity !What is diversity?
Diversity is variation
within a community.
Main Plant PartsMain Plant PartsAngiosperms are made up of Angiosperms are made up of 6 parts6 parts::
Stabilizes the plant below ground, absorbs water and nutrients from
the soil.
Stabilizes the plant above ground and allows plant to grow higher
and wider.
Act as food factories of the plant.Take in CO2, make glucose, release
O2. Waxy coat to prevent water
loss--
3 main parts:
1. Roots--
2. Stems--
3. Leaves--
Fibrous root system--
Trees Tap root system--
Cactus, Carrots
Woody stems--Trees, Roses
Herbaceous stems--
Grass, Flowers
Cuticle
Ripened ovary of a flowering plant that contains the seeds. Can be dry or fleshy
Part of flowering plant that contains an
embryo (young plant)and the food (cotyledon)it will need to grow into
a new plant.
Contain angiosperms reproductive parts.
4. Flowers--
5. Seeds--
6. Fruit--
Reproduction in AngiospermsReproduction in AngiospermsFlowers are the reproductive Flowers are the reproductive
structures of angiosperms.structures of angiosperms.
Some have male reproductive partsOthers have female
reproductive partsSome have both--male & female parts
MALE FLOWER PARTS
STAMEN
AntherFilament
POLLEN--
Powder containing male sperm
Hollow structure at bottom of pistil,contains female
egg cell.
FEMALE FLOWER PARTS
Stigma
Style
Ovary
PISTIL
Sticky, pollen
lands here
Flower PartsFlower Parts
PollinationPollinationProcess of getting pollen (sperm) of a plant to the egg—
may be the same plant/may be another plant.
ColorAroma (Smell)
Organisms that carry pollen from stamens to pistils.
Examples: insects, like honeybees, butterflies, moths, birds, and mammals, like bats.
Things that attract pollinators:
Pollinators:
Shape Size
How Does Pollination Occur?How Does Pollination Occur?Flowers provide foodFlowers provide food
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.
Butterflies--long, slender tongues to pollinate long, narrow flowers.
Bees--open, shallow flowers
NECTAR
Examples:
FertilizationFertilizationPollen travels down—thru the style into the ovary to fertilize Pollen travels down—thru the style into the ovary to fertilize
female egg. female egg.
Fruit protects newly fertilized egg.
Inside the fruit--the seeds that can develop into
new plants.
fertilized egg--
EMBRYOembryo-
-SEED
Ripened Ovary develops into a FRUI
T
Some fruits—1 seed--peachesOthers—Many seeds--apples
Are those fruits or veggies?Are those fruits or veggies?
Foods we call Foods we call vegetables are vegetables are
actually fruits: actually fruits: tomatoes, tomatoes,
cucumbers, cucumbers, squash, squash,
zucchini, and zucchini, and peppers.peppers.
Why???
Seed DispersalSeed Dispersal
How are seeds sent How are seeds sent out or dispersed out or dispersed
into the environment?into the environment?
Animals, water, wind, hooks on certain
seeds (cuckleburr)
How do angiosperms and animals help one
another?Seed lands—conditions right--GERMINATIO
N Sprouting
Quiz Time !!!!!!!!Quiz Time !!!!!!!!
How well did you listen and take How well did you listen and take notes?notes?
Number 1-4 somewhere on your Number 1-4 somewhere on your notes!!notes!!
1. Some leaves and fruit possess 1. Some leaves and fruit possess a waxy coat. What is a waxy coat. What is most most likely likely the purpose of this the purpose of this coating?coating?
A. It traps insectsA. It traps insects
B. It traps sunlightB. It traps sunlight
C. It prevents water lossC. It prevents water loss
D. It looks shinyD. It looks shiny
2. Roots that grow underground 2. Roots that grow underground are important for a plant's are important for a plant's survival. Which statement survival. Which statement bestbest describes their job?describes their job?
A. They absorb water and nutrients.A. They absorb water and nutrients.
B. They produce food.B. They produce food.
C. They contain the seeds for C. They contain the seeds for reproduction.reproduction.
D. They work to scare off underground D. They work to scare off underground predators.predators.
3. Milkweed is a plant that 3. Milkweed is a plant that secretes a milky substance secretes a milky substance
poisonous to insects. What is poisonous to insects. What is the the most likelymost likely advantage of advantage of
this characteristic? this characteristic? 1. Reproduction1. Reproduction
2. Respiration2. Respiration
3. Defense3. Defense
4. Photosynthesis4. Photosynthesis
4. Pollinators, such as birds and 4. Pollinators, such as birds and insects, are very important to insects, are very important to flowering plants. What is the flowering plants. What is the most importantmost important job that job that
they perform?they perform?
1. They bring food to the 1. They bring food to the plant.plant.
2. They scare off predators.2. They scare off predators.
3. They bring water to the 3. They bring water to the plant.plant.
4. They help plants 4. They help plants reproduce.reproduce.