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What to do…
Take a half sheet of paper.
Put your name on the paper.
Answer the following question.
What is the main function of a lysosome in
an animal cell?
Breaking down damaged cell parts
Plant Reproduction
Pieces of Ch. 6
Standard: SPI 4.2 Match flower parts
with their reproductive functions
Angiosperms (flowering plants)
• Plants that protect their seeds within the body
of a fruit.
• Make up ¾’s of all plants, including:
– Trees, shrubs, herbs,
grasses, water plants…
Structure of a Flower
1. Pistil
2. Stigma
3. Style
4. Ovary
5. Stamen
6. Filament
7. Anther
8. Petal
9. Sepal
10. Receptacle
11. Stem
Male Reproductive Structure
❀The stamen consists of
two parts: Anther and
Filament
❀The anther is where
meiosis occurs to produce
haploid pollen
❀The filament is a stalk
that supports the anther
Female Reproductive Structure
❀The pistil consists of
the stigma, style and
ovary
❀The sticky stigma
receives the pollen
from the anther
❀The pollen grows a
tube down through
the style
❀Meiosis occurs in the
ovary to produce
haploid ovules
Reproductive Structures
• Petals: colorful
structures that attract
pollinators.
• Sepals: surround and
protect the flower bud.
Pollination
❀Wind, insects or other
animals transfer pollen
from the anther of one
flower to the stigma of
another
❀Flowers vary depending
on pollination
mechanism
Pollination Vectors
Wind Pollination: Dull, scentless
flowers with reduced petals
Bees/Butterfly Pollination: Bright
color, nectaries, scent.
They sip nectar, get pollen on coats,
transfer pollen from flower to flower
Bird Pollination: Nectaries, bright
colors, tube-like flowers
Moth Pollination: White petals,
open at night
Fly Pollination:Rank odor, flesh
colored petals
Fertilization
● After pollen
lands on the
stigma, a pollen
tube grows
down through
the style to
ovary
Seed and Fruit Development
● After fertilization, the petals and sepals fall off
flower
● Ovary “ripens” into a fruit
● The ovule develops into a seed
Seed Dispersal MechanismsAllow plants to colonize new areas and avoid shade of parent plant
Wind Dispersal - Flight mechanisms
like parachutes, wings, etc.
Ex. Dandelion, maples, birch
Animal Dispersal - Fleshy fruits
which animals eat, drop undigested
seeds in feces or burrs which stick
to animals’ coats
Gravity Dispersal - Heavy
nuts fall to ground and
roll
ex. acorns
Water Dispersal - Plants
near water create floating
fruits
ex. coconuts
Put it together. . . .
COLOR and LABEL the following skill
sheet on Flower parts.
It is homework due TOMORROW if
you do not finish in class.