Plants without seeds Chapter 8, section 2 Key concepts What characteristics do the three groups of nonvascular plants share What characteristics do the three.
Download ReportTranscript Plants without seeds Chapter 8, section 2 Key concepts What characteristics do the three groups of nonvascular plants share What characteristics do the three.
Slide 1
Plants without seeds
Chapter 8, section 2
Slide 2
Key concepts
What characteristics do the three groups
of nonvascular plants share
What characteristics do the three groups
of seedless vascular plants share?
Slide 3
Introduction
Imagine you are hiking in the forest. You
see many ferns along the trail. You walk a
little father and stop to rest near a stream.
Here you see mosses everywhere=on the
forest floor on rocks and along the banks
of the stream. Although ferns and mosses
look very different, they have something in
common. They reproduce without forming
seeds.
Slide 4
Nonvascular Plants
Three major groups of nonvascular plants
Mosses
Liverworts and hornworts
They are low growing plants that live in moist
areas where they can absorb water and other
nutrients directly from their environment
Slide 5
Mosses
Green, fuzzy in the gametophyte
generation
Rhizoids anchor the moss and absorb
water and nutrients from the soil
Slide 6
Liverworts
Grow on a thick crust of moist rocks or soil
along the sides of a stream
Slide 7
Hornworts
Seldom found on tree
trunks or rocks, live in
moist soil, mixed in
with grass plants
Slide 8
Seedless vascular plants
Among the plants were huge, tree-sized ferns as
well as trees with branches that grew in a series
of circles along the trunk. Other trees resembled
giant sticks with leaves up to one meter long.
When the leaves dropped off, they left diamondshaped scars. These tall odd-looking trees were
the ancestors of three groups of plants that are
alive today-ferns-horsetails, and club mosses.
They are seedless plants that have vascular
tissue
Slide 9
Characteristics of seedless vascular
plants
Do not produce seeds
Reproduce by producing spores
Vascular plants grow tall
Strong cell walls providing strength and
stability
Need to grow in moist surroundings in
order for gametophytes produce egg cells
and sperm cells
Slide 10
Ferns
Underground root system
Slide 11
Horsetails
Long, coarse, needlelike branches grow in
a circle around each joint
Stems contains silica
During colonial times, Americans used the
plants to scrub their pots and pans
Slide 12
Club Mosses
Club mosses have vascular tissue
Grow in moist woodlands and near
streams
Slide 13
1. Which part of plant look like roots
rhyzoids
Slide 14
2. Which parts look like true stems and
leaves
Green stem like and leaf like structures
Slide 15
3. Why do scientists call these moss parts
roots, stems and leaves?
They do not have transport tissue as true
roots, stems and leaves do
Slide 16
4. How are mosses and other
nonvascular plants limited by their
lack of vascular tissue?
They do not grow very because they
cannot transport water as far and as fast
as is needed for a tall plant to survive
Slide 17
5. How are these plants similar to most
larger plants today?
They have vascular tissue
Slide 18
6. What structures give these seedless
plants strength and stability?
Vascular tissue
Slide 19
7. Why is moisture important for
reproduction in seedless vascular plants?
Sperm must swim through water to the
eggs
Slide 20
8. What advantage is the cuticle to the
plant?
It helps prevent water loss from the plant
Slide 21
9. What two characteristics do mosses,
liverworts, and hornworts share?
They are low growing and live in moist
environments where they can absorb
water and nutrients directly from their
environment
Slide 22
10. What two characteristics do ferns
horsetails and club mosses share?
Vascular tissue and the use of spores to
reproduce
Plants without seeds
Chapter 8, section 2
Slide 2
Key concepts
What characteristics do the three groups
of nonvascular plants share
What characteristics do the three groups
of seedless vascular plants share?
Slide 3
Introduction
Imagine you are hiking in the forest. You
see many ferns along the trail. You walk a
little father and stop to rest near a stream.
Here you see mosses everywhere=on the
forest floor on rocks and along the banks
of the stream. Although ferns and mosses
look very different, they have something in
common. They reproduce without forming
seeds.
Slide 4
Nonvascular Plants
Three major groups of nonvascular plants
Mosses
Liverworts and hornworts
They are low growing plants that live in moist
areas where they can absorb water and other
nutrients directly from their environment
Slide 5
Mosses
Green, fuzzy in the gametophyte
generation
Rhizoids anchor the moss and absorb
water and nutrients from the soil
Slide 6
Liverworts
Grow on a thick crust of moist rocks or soil
along the sides of a stream
Slide 7
Hornworts
Seldom found on tree
trunks or rocks, live in
moist soil, mixed in
with grass plants
Slide 8
Seedless vascular plants
Among the plants were huge, tree-sized ferns as
well as trees with branches that grew in a series
of circles along the trunk. Other trees resembled
giant sticks with leaves up to one meter long.
When the leaves dropped off, they left diamondshaped scars. These tall odd-looking trees were
the ancestors of three groups of plants that are
alive today-ferns-horsetails, and club mosses.
They are seedless plants that have vascular
tissue
Slide 9
Characteristics of seedless vascular
plants
Do not produce seeds
Reproduce by producing spores
Vascular plants grow tall
Strong cell walls providing strength and
stability
Need to grow in moist surroundings in
order for gametophytes produce egg cells
and sperm cells
Slide 10
Ferns
Underground root system
Slide 11
Horsetails
Long, coarse, needlelike branches grow in
a circle around each joint
Stems contains silica
During colonial times, Americans used the
plants to scrub their pots and pans
Slide 12
Club Mosses
Club mosses have vascular tissue
Grow in moist woodlands and near
streams
Slide 13
1. Which part of plant look like roots
rhyzoids
Slide 14
2. Which parts look like true stems and
leaves
Green stem like and leaf like structures
Slide 15
3. Why do scientists call these moss parts
roots, stems and leaves?
They do not have transport tissue as true
roots, stems and leaves do
Slide 16
4. How are mosses and other
nonvascular plants limited by their
lack of vascular tissue?
They do not grow very because they
cannot transport water as far and as fast
as is needed for a tall plant to survive
Slide 17
5. How are these plants similar to most
larger plants today?
They have vascular tissue
Slide 18
6. What structures give these seedless
plants strength and stability?
Vascular tissue
Slide 19
7. Why is moisture important for
reproduction in seedless vascular plants?
Sperm must swim through water to the
eggs
Slide 20
8. What advantage is the cuticle to the
plant?
It helps prevent water loss from the plant
Slide 21
9. What two characteristics do mosses,
liverworts, and hornworts share?
They are low growing and live in moist
environments where they can absorb
water and nutrients directly from their
environment
Slide 22
10. What two characteristics do ferns
horsetails and club mosses share?
Vascular tissue and the use of spores to
reproduce