Title: Flower Dissection Activity
1FlowerDissectionActivity
2 There are two types of plants
-
- plants with seeds and
- plants without seeds.
3Plants without Seeds
Mosses
Liverworts
Horsetails
Ferns
4How do plants reproduce without seeds
- Plants without seeds reproduce through spores
that are released into the air.
5Life Cycle of Ferns
The spores are both male and female so sexual
reproduction is taking place.
6There are two types of reproduction.
- Asexual Reproduction Requires one cell through
divisions of mitosis. - 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.
Potato Sprouts
Flowering plants with seeds
7Plants with Seeds
Gymnosperms
Angiosperms
Pine trees or conifers are an example of a
plant that reproduces by seeds but without
flowers.
Poppies are a type of flowering plant that
reproduce by seeds made by flowers.
8Flowering Plants
- A flowering plant has both male and female parts.
The female part is called the pistil.
The male part is called the stamen.
9Please write this definition on your worksheet
- Stamen The male reproductive structure of a
flowering plant
10Please write this definition on your worksheet
- Anther the structure located on top of the
stamen and carries the pollen
11Pollen
- 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.
12Pollinators
- A pollinator is something that moves pollen from
the male parts to the female parts.
Can you name any other pollinators
13Please write this definition on your worksheet
- Filament a thread-like part that holds up the
anther
14Please write this definition on your worksheet
- Pistil the female reproductive structure of a
flowering plant
15Please write this definition on your worksheet
- Stigma the sticky surface on the top of the
pistil it traps and holds the pollen
16Please write this definition on your worksheet
- Style the tube-like structure that holds up the
stigma
17Please 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)
18Please 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!
19Please write this definition on your worksheet
Petal the colorful flower parts that surround
the reproductive structures
20Please 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
21Please write this definition on your worksheet
- Perfect flowers that have both male and female
parts (ex. Roses lilies and pea plants)
22Please write this definition on your worksheet
- Imperfect flowers with male or female parts (ex-
cucumbers pumpkins and melons)
23Please 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/watchvAYwAOmcNcCk
24Illustrate the Pollination Process
- 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/pollinatio
n.mov and illustrate what you see.
25Congratulations!
- 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.
26Good-bye!
- Created by Ms. Smith
- Washington Middle School
- La Habra California
- 2007
