Flower Dissection Activity

1
FlowerDissectionActivity
2
There are two types of plants

• plants with seeds and
• plants without seeds.

3
Plants without Seeds
Mosses
Liverworts
Horsetails
Ferns
4
How do plants reproduce without seeds?

• Plants without seeds reproduce through spores
  that are released into the air.

5
Life Cycle of Ferns
The spores are both male and female, so sexual
reproduction is taking place.
6
There 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
7
Plants 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.
8
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.
9
Please write this definition on your worksheet

• Stamen The male reproductive structure of a
  flowering plant

10
Please write this definition on your worksheet

• Anther the structure located on top of the
  stamen and carries the pollen

11
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.
12
Pollinators

• A pollinator is something that moves pollen from
  the male parts to the female parts.

Can you name any other pollinators?
13
Please write this definition on your worksheet

• Filament a thread-like part that holds up the
  anther

14
Please write this definition on your worksheet

• Pistil the female reproductive structure of a
  flowering plant

15
Please write this definition on your worksheet

• Stigma the sticky surface on the top of the
  pistil it traps and holds the pollen

16
Please write this definition on your worksheet

• Style the tube-like structure that holds up the
  stigma

17
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)

18
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! ?
19
Please write this definition on your worksheet
Petal the colorful flower parts that surround
the reproductive structures
20
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

21
Please write this definition on your worksheet

• Perfect flowers that have both male and female
  parts (ex. Roses, lilies, and pea plants)

22
Please write this definition on your worksheet

• Imperfect flowers with male or female parts (ex-
  cucumbers, pumpkins, and melons)

23
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?vAYwAOmcNcCk
24
Illustrate 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.
25
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.

26
Good-bye!

• Created by Ms. Smith
• Washington Middle School
• La Habra, California
• 2007