1. log What are the functions of roots. List the 2 main types
Take out outline
Lets see the book questions

2. Plant Structures
Lesson 3
Page

3. Key things to Know What are the functions of roots, stems, and leaves?
How do seeds become new plants?
What are the structures of a flower?

4. Chapter 12
Section 4 Structures of Seed Plants
Roots
Root Functions The following are the main functions of roots:
Roots supply plants with water and dissolved minerals via absorption from soil
Roots anchor or hold plants securely in the soil.
Roots store surplus food made during photosynthesis
Click to see root transport

5. 2 main types of roots

6. Root Systems 1 main root, or tap root, that grows downward.
Taproot systems
Fibrous systems
1 main root, or tap root, that grows downward.
several roots that spread out from the base of the stem.

7. Chapter 12 Section 4 Structures of Seed Plants
Root hairs help to anchor plant and absorb nutrients and water

8. Chapter 12 Roots, continued
Section 4 Structures of Seed Plants
Roots, continued
Root Structure The layers of cells that cover the surface of the roots is called the epidermis.
After water and minerals are absorbed by the epidermis, they diffuse into the center of the root where the vascular tissue is located.
A root cap can be found at the end of the root. The root cap protects the tip and helps the root continue to grow.

9. Plant Structures Root Structure Roots have many structures.
These cause the root to grow longer
Root Cap protect the root

10. Chapter 12 Stems Two Main Types Woody and Herbaceous
Section 4 Structures of Seed Plants
Chapter 12
Stems
Two Main Types
Woody and Herbaceous
Stem Functions A stem connects a plant’s roots to its leaves and flowers. A stem also has the following functions:
Stems support the plant body.
Stems transport materials between the root system and the shoot system.
Some stems store materials such as food.

11. Plant Structures Stem Structure
The woody stem of a tree contains many different structures. What are the active xylem and phloem on the tree trunk?

12. Chapter 12 Herbaceous Stem Stems are soft thin flexible
Section 4 Structures of Seed Plants
Herbaceous Stem
Stems are
soft
thin
flexible

13. Chapter 12
Section 4 Structures of Seed Plants
Woody Stems Trees and shrubs have rigid stems made of wood and bark. These stems are called woody stems.

14. Plant Structures
Leaf function- capture sun light and do photosynthesis
Structure-Each structure helps a leaf produce food.

16. Chapter 12 Allow CO2 to enter Opens and closes Stoma
Section 4 Structures of Seed Plants
These cell contain chloroplast
Allow CO2 to enter
Opens and closes Stoma

17. Plant Structures Transpiration Click for animation Stomata
Stomata can slow water loss.
Transpiration Click for animation
the process by which moisture is carried through plants from roots to stomata, where it changes to vapor and is released to the atmosphere. Or
evaporation of water from plant leaves

18. Chapter 12 Leaves, continued Leaf Exceptions
Section 4 Structures of Seed Plants
Leaves, continued
Leaf Exceptions
Some leaves have functions other than photosynthesis.
The leaves of many cactuses are modified as spines. These spines keep animals from eating the cactuses.
The leaves of sundews are modified to catch insects, which the sundew digests.

19. Chapter 12 The Structure of a Seed Section 3 Seed Plants
Protects the embryo and food from drying out
embryo

20. Plant Structures Story of a Seed
Which is the seed’s embryo, cotyledons, and seed coat on the diagram?
Stem and
root
Stored
Food

21. Seed dispersal Animals eating fruit Seeds hook onto clothing & fur
Water in rivers or streams carry seeds
Wind
Some plants eject seeds

22. Germination Embryo begins to grow and pushes out of the seed
Seeds remain dormant or inactive until conditions are right for germination. All seeds need water, oxygen, and proper temperature in order to germinate.

23. Flowers- the reproductive structure for angiosperms
Chapter 12
Flowers- the reproductive structure for angiosperms
Pollination-the transfer of pollen from male to female parts of the plant
Sepals-The modified leaves that make up the outermost ring of flower parts and protect the bud are called sepals.
Petals are broad, flat, thin leaflike parts of a flower.

24. Chapter 12 Flowers, continued
Stamens and Pistils The male reproductive structure of a flower is called a stamen.
A Pistil is the female reproductive structure of a flower.

25. Plant Structures
Structures of a Typical Flower

26. Note: Theses are short answer questions.
Log: Oct. 18th
Note: Theses are short answer questions.
Can a gymnosperm be classified as a Dicot? Explain why.
Explain how you people are beneficial part of a plants seed dispersal and pollination?
Work on completing Section 3 Mapping Diagram

27. Note: Theses are short answer questions.
Log: Oct. 18th
Note: Theses are short answer questions.
Why do you think angiosperms enclose their seeds in fruit?