Plant Groups Slides Plant Science
Visual Learning Guide
The Major Plant Groups & Seeds
From the simplest aquatic algae to towering evergreens and flowering plants.
1. Charophytes
2. Bryophytes
3. Pteridophytes
4. Seed Plants
GROUP 1
Charophytes
Freshwater Ancestors
Core Concept
Charophytes are the simplest group of plants.
Freshwater green algae closely related to land plants
Lack vascular tissue , true roots, stems, leaves, and seeds
Contain chlorophyll a and b
Fill-in Target
Which is the simplest group of plants?
→ Charophytes
Topic: Charophytes Slide 2 / 9
GROUP 2
Bryophytes
Non-Vascular Land Plants
Core Concept
Bryophytes are non-vascular plants, best known as mosses.
No xylem or phloem; they absorb water directly by osmosis
Grow short and low to the ground
Reproduce using spores , never seeds
Key Requirement
Bryophytes require a film of water for reproduction.
Examples: Mosses, Liverworts, Hornworts
Topic: Bryophytes Slide 3 / 9
GROUP 3
Pteridophytes
Seedless Vascular Plants
Core Concept
Pteridophytes are seedless vascular plants, most famously ferns.
Have vascular tissue (xylem and phloem ) to grow taller
Produce spores on the undersides of fronds (no seeds)
Young unrolling leaves are called fiddleheads
Leaf Terminology
Fern leaves are known as fronds .
Examples: Ferns, Horsetails, Club Mosses
Topic: Pteridophytes Slide 4 / 9
GROUP 4
Gymnosperms
Naked Seeds & Cones
Core Concept
Gymnosperms is the plant group that contains the “evergreens”.
Includes conifers: pines, firs, spruces , and cedars
“Naked seeds” develop on scales of cones Pollen is carried by the wind
Fill-in Target
Which plant group contains the “evergreens”?
→ Gymnosperms
Topic: Gymnosperms & Evergreens Slide 5 / 9
GROUP 5
Angiosperms
Flowering & Fruiting Plants
Core Concept
Angiosperms produce flowers and bear seeds enclosed inside a fruit.
Flowers attract animal pollinators (bees, birds, insects)
Ovary ripens into a fruit protecting the seeds
The most diverse group (80% to 90% of all plants)
Everyday Examples
Nearly all garden plants, grasses, hardwood trees, and food crops.
Examples: Oak trees, Apple trees, Grasses, Roses
Topic: Angiosperms Slide 6 / 9
SEED STRUCTURE
Seeds & The Tiny New Plant
Reproductive Anatomy
Core Concept
A reproductive unit containing a tiny, new plant is a seed.
1
Embryo: The tiny, new plant inside the seed
2
Stored Food: Nourishment for early growth
3
Seed Coat: Protective outer barrier
Fill-in Targets
Reproductive unit with a tiny new plant:
→ Seed
The tiny new plant itself:
→ Embryo
Topic: Seed Anatomy Slide 7 / 9
COMPARISON
Basic Differences Between Major Groups
Quick Reference
Plant Group
Vascular System?
Seeds or Spores?
Defining Trait
Charophytes
None
None
Simplest group of plants
Bryophytes
Non-vascular
Spores
Low-growing mosses
Pteridophytes
Vascular
Spores
Seedless ferns with fronds
Gymnosperms
Vascular
Naked Seeds
Contains the “evergreens”
Angiosperms
Vascular
Seeds in Fruit
Flowering plants, most diverse
Topic: Major Group Differences Slide 8 / 9
SUMMARY
Essential Concept Check
Quick Review
CONCEPT 1
Simplest Plant Group
Which is the simplest group of plants ?
Charophytes
CONCEPT 2
The Evergreens
Which plant group contains the “evergreens” ?
Gymnosperms
CONCEPT 3
Reproductive Unit
A reproductive unit containing a tiny, new plant is a:
Seed (with embryo)
Topic: Key Review Slide 9 / 9
Plant Groups Guided Notes Major Plant Groups & Seed Anatomy
Fill-in-the-Blank Guided Notes
Name:
Date:
Period:
Directions: Complete each sentence using the exact word or phrase shown on the slides. Study Guide
GROUP 1
Charophytes — The Simplest Plant Group
Slide 2
1. Core Concept: are the simplest group of plants .
2. Charophytes are freshwater closely related to modern land plants.
3. Charophytes lack tissue, true roots, stems, leaves, and seeds.
4. Like land plants, charophytes contain chlorophyll and .
GROUP 2
Bryophytes — Non-Vascular Land Plants
Slide 3
1. Bryophytes are plants that include mosses , liverworts, and hornworts.
2. Bryophytes have no vascular tissue (no xylem or phloem) and absorb water directly through .
3. Because they lack transport tubes, bryophytes remain short and grow .
4. Bryophytes reproduce using single-celled , never seeds or flowers.
5. Bryophytes require a film of for reproduction so sperm can swim to the egg.
GROUP 3
Pteridophytes — Seedless Vascular Plants
Slide 4
1. Pteridophytes are plants, most famously represented by ferns .
2. They have true vascular tissue ( and ), which allows them to grow taller.
3. Ferns do not produce seeds; instead, they reproduce with located under fronds.
4. Fern leaves are called , and young developing leaves unroll as .
GROUP 4
Gymnosperms — Naked Seeds & The Evergreens
Slide 5
1. Core Concept: is the plant group that contains the “evergreens ”.
2. Common evergreen conifers include pines, firs, , and cedars.
3. The word gymnosperm means “ seed” because seeds develop on scales of rather than fruits.
4. Pollen in gymnosperms is primarily transported and dispersed by the .
Plant Kingdom Groups — Student Notes Page 1 of 2
Part II: Angiosperms, Seed Anatomy & Differences
Plant Groups Notes
GROUP 5
Angiosperms — Flowering & Fruiting Plants
Slide 6
1. Angiosperms are vascular plants that produce and bear seeds enclosed inside a .
2. Flowers are specialized reproductive structures designed to attract (like bees and birds).
3. Angiosperms are the most and widespread plant group, making up over 80% to 90% of all living plant species.
4. Examples include oak trees, grasses, apple trees, and .
SEED ANATOMY
Seeds & The Tiny New Plant Inside
Slide 7
• Core Definition: A reproductive unit of a plant that contains a tiny, new plant is a .
1. The Embryo: The plant inside the seed that develops into a mature plant.
2. Stored Food (Endosperm/Cotyledon): Provides for the growing embryo until it can photosynthesize.
3. Seed Coat: A tough outer layer that protects the internal embryo from .
CHART
Basic Differences Between Major Groups
Slide 8
Plant Group
Vascular System?
Seeds or Spores?
Defining Characteristic
Charophytes
None
None
The group of plants
Bryophytes
Spores (No seeds)
Low-growing, includes
Pteridophytes
Vascular
Seedless vascular, includes ferns
Gymnosperms
Vascular
Seeds
Contains the “” (cones)
Angiosperms
Vascular
Enclosed in
Produces & fruits
Key Concept Quick Check
[Check 1]
Which is the simplest group of plants? → Answer:
[Check 2]
Which group of plants contains the “evergreens”? → Answer:
[Check 3]
A reproductive unit of a plant that contains a tiny, new plant is a: → Answer:
Plant Kingdom Groups — Student Notes Page 2 of 2
Plant Groups Answer Key Major Plant Groups & Seed Anatomy
Teacher Answer Key
TEACHER REFERENCE KEY
Instructional Note: Correct student responses are indicated below in bold green text . Complete Key
GROUP 1
Charophytes — The Simplest Plant Group
Slide 2
1. Core Concept: Charophytes are the simplest group of plants .
2. Charophytes are freshwater green algae closely related to modern land plants.
3. Charophytes lack vascular tissue, true roots, stems, leaves, and seeds.
4. Like land plants, charophytes contain chlorophyll a and b.
GROUP 2
Bryophytes — Non-Vascular Land Plants
Slide 3
1. Bryophytes are non-vascular plants that include mosses , liverworts, and hornworts.
2. Bryophytes have no vascular tissue (no xylem or phloem) and absorb water directly through osmosis.
3. Because they lack transport tubes, bryophytes remain short and grow low to the ground.
4. Bryophytes reproduce using single-celled spores, never seeds or flowers.
5. Bryophytes require a film of water for reproduction so sperm can swim to the egg.
GROUP 3
Pteridophytes — Seedless Vascular Plants
Slide 4
1. Pteridophytes are seedless vascular plants, most famously represented by ferns .
2. They have true vascular tissue (xylem and phloem), which allows them to grow taller.
3. Ferns do not produce seeds; instead, they reproduce with spores located under fronds.
4. Fern leaves are called fronds, and young developing leaves unroll as fiddleheads.
GROUP 4
Gymnosperms — Naked Seeds & The Evergreens
Slide 5
1. Core Concept: Gymnosperms is the plant group that contains the “evergreens ”.
2. Common evergreen conifers include pines, firs, spruces, and cedars.
3. The word gymnosperm means “naked seed” because seeds develop on scales of cones rather than fruits.
4. Pollen in gymnosperms is primarily transported and dispersed by the wind.
Plant Kingdom Groups — Teacher Key Page 1 of 2
Part II: Angiosperms, Seed Anatomy & Differences
Teacher Key
GROUP 5
Angiosperms — Flowering & Fruiting Plants
Slide 6
1. Angiosperms are vascular plants that produce flowers and bear seeds enclosed inside a fruit.
2. Flowers are specialized reproductive structures designed to attract pollinators (like bees and birds).
3. Angiosperms are the most diverse and widespread plant group, making up over 80% to 90% of all living plant species.
4. Examples include oak trees, grasses, apple trees, and roses / sunflowers.
SEED ANATOMY
Seeds & The Tiny New Plant Inside
Slide 7
• Core Definition: A reproductive unit of a plant that contains a tiny, new plant is a seed.
1. The Embryo: The tiny, new plant inside the seed that develops into a mature plant.
2. Stored Food (Endosperm/Cotyledon): Provides nourishment / nutrients for the growing embryo until it can photosynthesize.
3. Seed Coat: A tough outer layer that protects the internal embryo from drying out and damage.
CHART
Basic Differences Between Major Groups
Slide 8
Plant Group
Vascular System?
Seeds or Spores?
Defining Characteristic
Charophytes
None
None
The simplest group of plants
Bryophytes
Non-vascular
Spores (No seeds)
Low-growing, includes mosses
Pteridophytes
Vascular
Spores (Seedless)
Seedless vascular, includes ferns
Gymnosperms
Vascular
Naked
Contains the “evergreens ” (cones)
Angiosperms
Vascular
Enclosed in fruit
Produces flowers & fruits
Key Concept Quick Check
[Check 1]
Which is the simplest group of plants? → Answer: Charophytes
[Check 2]
Which group of plants contains the “evergreens”? → Answer: Gymnosperms
[Check 3]
A reproductive unit of a plant that contains a tiny, new plant is a: → Answer: Seed (tiny plant = embryo )
Plant Kingdom Groups — Teacher Key Page 2 of 2
Plant Groups Sorting Activity Plant Groups Sorting Challenge
Part I: Group Classification Sort
Name:
Date:
Period:
Directions: Match each letter from the Feature Bank below into the correct plant group box. Each group receives exactly two letters. Page 1 of 2
Characteristic & Feature Bank
[A] Contains the “evergreens” (pines, spruces, firs, cedars)
[F] Seedless vascular plants with large fronds & fiddleheads
[B] The simplest group of plants; freshwater green algae
[G] Non-vascular; absorbs water by osmosis; includes mosses
[C] Produces flowers and bears seeds enclosed inside a fruit
[H] Has vascular tissue (xylem/phloem) but does not produce seeds
[D] Lacks vascular tissue; needs a film of water for swimming sperm
[I] Produces naked seeds on cones; pollinated by the wind
[E] Lacks true roots, stems, leaves, seeds, and vascular plumbing
[J] Most diverse plant group, making up 80% to 90% of all plants
Group 1
Charophytes
Simplest Group
First Letter:
Second Letter:
Key Note: Green algae ancestors with no vascular plumbing.
Group 2
Bryophytes
Non-Vascular
First Letter:
Second Letter:
Key Note: Mosses that grow low; reproduce via spores.
Group 3
Pteridophytes
Seedless Vascular
First Letter:
Second Letter:
Key Note: Ferns with true xylem & phloem; no seeds.
Group 4
Gymnosperms
The “Evergreens” & Cones
First Letter:
Second Letter:
Key Note: Vascular plants with “naked seeds” on cones; includes pines, firs, and spruces.
Group 5
Angiosperms
Flowers & Protected Fruit
First Letter:
Second Letter:
Key Note: Vascular flowering plants whose seeds are enclosed inside fruits; most diverse.
Plant Groups Sorting Challenge Page 1 of 2
Seed Anatomy & Key Review
Part II & Part III
Page 2 of 2
Directions: Complete the seed anatomy breakdowns and quick recall questions below. Reinforcement
PART II
Seed Anatomy: 3 Primary Components
Reproductive Unit of Seed Plants
Core Definition: A reproductive unit of a plant that contains a tiny, new plant is a .
1
The Embryo
What is this structure?
Fill in the blank:
The plant inside the seed that develops into a mature plant.
2
Stored Food
Endosperm / Cotyledons
Fill in the blank:
Provides for the young plant until it can photosynthesize.
3
Seed Coat
Protective Exterior
Fill in the blank:
Tough barrier that prevents the embryo from .
PART III
Essential Concept Review
Which is the simplest group of plants ?
Which group of plants contains the “evergreens” ?
A reproductive unit of a plant that contains a tiny, new plant is a:
What is the name of the tiny, new plant found inside a seed?
Plant Groups Sorting Challenge Page 2 of 2
Plant Groups Sorting Key Plant Groups Sorting Challenge
Teacher Answer Key — Page 1
TEACHER KEY
Grading Guide: Correct letter placements for each plant group are highlighted below in bold green text . Page 1 of 2
Characteristic & Feature Bank Reference
[A] Contains the “evergreens” (pines, spruces, firs, cedars)
[F] Seedless vascular plants with large fronds & fiddleheads
[B] The simplest group of plants; freshwater green algae
[G] Non-vascular; absorbs water by osmosis; includes mosses
[C] Produces flowers and bears seeds enclosed inside a fruit
[H] Has vascular tissue (xylem/phloem) but does not produce seeds
[D] Lacks vascular tissue; needs a film of water for swimming sperm
[I] Produces naked seeds on cones; pollinated by the wind
[E] Lacks true roots, stems, leaves, seeds, and vascular plumbing
[J] Most diverse plant group, making up 80% to 90% of all plants
Group 1
Charophytes
Simplest Group
First Letter: B
Second Letter: E
Key Note: Green algae ancestors with no vascular plumbing.
Group 2
Bryophytes
Non-Vascular
First Letter: G
Second Letter: D
Key Note: Mosses that grow low; reproduce via spores.
Group 3
Pteridophytes
Seedless Vascular
First Letter: F
Second Letter: H
Key Note: Ferns with true xylem & phloem; no seeds.
Group 4
Gymnosperms
The “Evergreens” & Cones
First Letter: A
Second Letter: I
Key Note: Vascular plants with “naked seeds” on cones; includes pines, firs, and spruces.
Group 5
Angiosperms
Flowers & Protected Fruit
First Letter: C
Second Letter: J
Key Note: Vascular flowering plants whose seeds are enclosed inside fruits; most diverse.
Plant Groups Sorting Challenge — Teacher Key Page 1 of 2
Seed Anatomy & Key Review
Teacher Answer Key — Page 2
Page 2 of 2
Grading Guide: Correct answers are shown below in bold green text . Answer Key
PART II
Seed Anatomy: 3 Primary Components
Teacher Reference
Core Definition: A reproductive unit of a plant that contains a tiny, new plant is a seed .
1
The Embryo
What is this structure?
Answer:
The tiny, new plant inside the seed that develops into a mature plant.
2
Stored Food
Endosperm / Cotyledons
Answer:
Provides nourishment for the young plant until it can photosynthesize.
3
Seed Coat
Protective Exterior
Answer:
Tough barrier that prevents the embryo from drying out / damage .
PART III
Essential Concept Review Answers
Which is the simplest group of plants ?
Charophytes
Which group of plants contains the “evergreens” ?
Gymnosperms
A reproductive unit of a plant that contains a tiny, new plant is a:
Seed
What is the name of the tiny, new plant found inside a seed?
Embryo
Plant Groups Sorting Challenge — Teacher Key Page 2 of 2
