Transcript Flower Dissection Activity

Flower
Dissection
Activity
There are two types of
plants………
plants with seeds and
plants without seeds.
Plants without Seeds
Mosses
Horsetails
Liverworts
Ferns
How do plants reproduce
without seeds?
Plants without seeds reproduce through spores that are
released into the air.
There are two types of
reproduction.
Asexual Reproduction: Requires one cell through divisions
of mitosis.
Potato
Sprouts
Sexual Reproduction: Requires two haploid cells, a male
sex cell and a female sex cell, each with half the DNA
required to make the new organism.
Flowering plants
with seeds
Plants with Seeds
Gymnosperms
Pine trees, or conifers,
are an example of a
plant that reproduces
by seeds but without
flowers.
Angiosperms
Poppies are a type of
flowering plant that
reproduce by seeds
made by flowers.
Flowering Plants
A flowering plant has both male and
female parts.
The female
part is called
the pistil.
The male part
is called the
stamen.
**Please write this definition on your worksheet**
Stamen: The male reproductive
structure of a flowering plant
**Please write this definition on your worksheet**
Anther: the structure located on top
of the stamen and carries the
pollen
Pollen
Pollen is the male sex cell that donates half of
the DNA to make a seed.
It is a powdery substance, usually orange
or yellow in color, that gets carried by
pollinators.
Pollinators
A pollinator is something that moves pollen from
the male parts to the female parts.
Can you name any other pollinators?
**Please write this definition on your worksheet**
Filament: a thread-like part that
holds up the anther
**Please write this definition on your worksheet**
Pistil: the female reproductive
structure of a flowering plant
**Please write this definition on your worksheet**
Stigma: the sticky surface on the
top of the pistil; it traps and holds
the pollen
**Please write this definition on your worksheet**
Style: the tube-like structure that
holds up the stigma
**Please write this definition on your worksheet**
Ovary: the plant part at the bottom
of the flower that has ovules inside
(this turns into the fruit and seeds we eat)
**Please write this definition on your worksheet**
Ovules: the female sex cells inside
the ovary that donate half the DNA
to become the seed
(They become the seeds when pollinated or fertilized by the pollen.)
A baby seed! 
**Please write this definition on your worksheet**
Petal: the colorful flower
parts that surround the
reproductive structures
**Please write this definition on your worksheet**
Sepal: the green petal-like parts at
the base of the flower; they help
protect the bud when it develops
**Please write this definition on your worksheet**
Perfect: flowers that have both male
and female parts (ex. Roses, lilies,
and pea plants)
**Please write this definition on your worksheet**
Imperfect: flowers with male or
female parts (ex- cucumbers,
pumpkins, and melons)
**Please write this definition on your worksheet**
Pollination: when pollen moves from
the male parts to the female parts
Watch a bee pollinate a passion flower at
http://www.youtube.com/watch?v=AYwAOmcNcCk
Illustrate the
Pollination Process
1.
First, draw two flowers and label the
parts of the male and female
reproductive structures.
2. Then, watch the pollination animation at
http://smithsonlineclassroom.com/media/pollination.mov
and illustrate what you see.
Congratulations!
You have just learned about the following California Science Standards in
less than an hour:
•
Genetics 2a: the differences between sexual and asexual organisms
•
Genetics 2b: offspring inherit half their genes from each parent
•
Structure and Function of Living Organisms 5f: the structures and
processes by which flowering plants generate pollen and ovules,
seeds, and fruit.
Good-bye!
Created by: Ms. Smith
Washington Middle School
La Habra, California
2007