Bacteria to Plants
Chapter 5 Seed Plants
Section 2 Gymnosperms
Key Concepts:
1. What are the characteristics of gymnosperms?
2. How do gymnosperms reproduce?
3. _________________________________________?
Key Terms:
• Gymnosperm
• Cone
• Ovule
• Pollination
Characteristics of Gymnosperms
Gymnosperms- A seed
plant that produces naked
seeds that are not covered
by a fruit coating
 ____________________
______________________
 Deeper growing root
systems
 Oldest type of seed plant
 _________________
Types of Gymnosperms
1.Cycads
 ___________________________
 Look like palm trees with cones
 Cones can grow to the size
of a football
2. Conifers
 Largest and most diverse group
 produce cones
 ___________________
 Keep their leaves year round
Types of Gymnosperms
3. Ginkgoes
 _____________________
 Ginkgo biloba
 Chinese and Japanese
kept them in gardens
 Put on city streets
because they can tolerate
air pollution.
4. Gnetophytes
 ____________________
 Tropical Rain Forests
 Trees, Shrubs, Vines
Gymnosperm Reproduction
Cones- __________________
__________________________
 Male Cones
 Produce tiny grains of
pollen that contain the
sperm cells
 Female Cones
Ovule- Produces the
female gametophyte
that contains the egg
cells
 After fertilization
the ovule becomes a
_____________
Gymnosperm Reproduction
1.Pollination
 Pollination- Transfer of
pollen from a male
reproductive structure
to a female reproductive
structure
 _________________
2. ______________
 Once pollination has
occurred the female cone
and ovule close to seal in
pollen
 Fertilized egg cell
develops into an embryo.
Gymnosperm Reproduction
3. Seed Development
 Female cones remain on tree at the
seed develops
_______________________________
 Male cone falls off the tree
4. Seed Dispersal
 Seeds become mature and cone
scales open
 Wind shakes seeds loose and
spreads them
 _____________________________
Gymnosperms in Our World
1.
2.
3.
4.
5.
Paper
__________________
Rayon fibers in clothes
Cellophane wrappers on food
Rosin
 Trees are grown in large
cycled fields
 Cut down adult tree
 _____________________
_______________________
 Cycle through trees so the
new is an adult when they
come back
Chapter 5 Seed Plants
Section 2 Gymnosperms
1. What are the characteristics of gymnosperms?
2. How do gymnosperms reproduce?
3. What important products come from gymnosperms?
Section Review on p. 150