Download What is pollination?

ENDURING
UNDERSTANDING
• Flowers depend on seed
production and dispersal
for their reproduction.
LEARNING GOAL
• I will dissect and mount the structures of
simple flowers.
• I will examine a variety of seeds to discover
their dispersal mechanisms.
• I will explain the function of flowers and
pollination.
• I will explain how seed-dispersal mechanisms
contribute to a plant’s survival.
• I will understand the origin of seeds by
investigating the reproductive systems in
flowers.
PLANT REPRODUCTION
READING QUESTIONS
DISCUSSION
POLLINATION REVIEW
• What is the purpose of flowers?
• What is pollination?
• Why are there so many different
colors and shapes of flowers?
• What is a seed and what is its
purpose?
• Why is it not a good idea for all
the seeds to grow directly under
the parent plant?
IMAGES
• Let’s look at some
POLLINATORS, FLOWERS,
AND SEED-DISPERSAL
MECHANISMS on the cdrom
Plant Reproduction
POLLINATION
BEES
SEXUAL REPRODUCTION
FLOWERS
SEEDS
Flower Parts
STIGMA
PETALS
SEPALS
STAMEN
OVARY
PISTIL
ANTHER
SEED DIVERSITY
• We know quite a bit about seeds,
including where they come from,
their basic parts, what happens
when they start to germinate, and
the roles played by the parts of
the sprouting seed. There is a lot
of similarity among seeds. But
there is a lot of diversity in seeds
as well.
• In what ways are seeds different?
SURVIVAL
• The ultimate measure of an
organism’s success is its
survival until it reproduces.
Survival depends on the
organism’s ability to acquire the
resources necessary to stay
alive, including air, water,
nutrients, energy, and space.
Many Monera, animals, and
protists can move to find the
resources they need for survival.
Plants can not.
SURVIVAL
• Plants have to use other
strategies for acquiring
resources. One important
strategy for survival is growing
in a location where there is little
competition for resources. In
many cases this means starting
life some distance away from the
parent plant.
SEED DISPERSAL
• Seeds are not rooted in the
ground. This is the only time in a
plant’s life that it can move. Seeds
must have ways to get away from
the parent plant. The features of
seeds that allow them to move are
called seed-dispersal mechanisms.
• Have you seen examples of seed
dispersal?
• What kinds of features do the
seeds have that allow them to
move away from the parent plant?
READING
• Turn your book to page 46
and we will read “Seeds on
the Move”.
• We will do “Read and Sketch”
to help us remember
important information.
SEED DISPERSAL
• Has anyone ever had to remove
stickers or burs from a cat or dog’s
fur?
• What do your socks look like after
a walk through a field in the fall?
• What happens to dandelions after
they go to seed? What are the
fluffy things that blow away?
• What do squirrels do with all those
acorns they collect in the fall?
SEED HUNT
• Today we are going to look
for seeds in nature to see
what kinds of features they
have for getting around. We
are going to take a walk
around campus to look for
seeds on plants that are
growing there.
SEED-COLLECTION
BAGS
SEED DIVERSITY
• How many different seeddispersal features did you
observe on seeds in our
area?
• What dispersal mechanism is
used the most by plants in
our area?