Structures of a Flowering Plant

1. Structures of a Flowering Plant 6.4.2: Summarize the basic functions of the structures of a flowering plant for defense, survival, and reproduction.

2. Discuss How do plants protect themselves?

3. Essential Question ? What are some of the structures plants use for defense and survival?

4. Structures for defense Plants have structures for defense that protect them from threats and without these defenses the plant might die. Examples of natural defenses that plants have developed over time may be:

5. Structures for defense • thorns that can defend the plant from being eaten by some animals or destroyed by others.

6. Structures for defense • fruits and leaves with poisons so that they are not eaten by animals.

7. Structures for defense • the ability to close its leaves when touched (thigmotropism).

8. How do thorns defend a plant?

9. Write down 3 poisonous plants.

10. How can thigmotropic plants defend themselves? https://www.youtube.com/watch?v=BLTcVNyOhUc

11. Structures for Survival Plants have structures that allow them to survive in their habitats when the conditions are not suitable. Examples of parts of flowering plants that function for survival may be:

12. Structures for Survival: Leaves • Leaves are important because they are the site of: • Photosynthesis (when plants make sugar for food) • Respiration (when plants break sugar down for energy) • Transpiration (when plants release water vapor into the atmosphere) This is a review term. Photosynthesis

13. Is this also considered thigmotropism? How have the leaves of this plant adapted for survival?

14. Structures for Survival: Stems Stems support the plant and hold the leaves up to the light. Stems also function as food storage sites. • Xylem transports water from roots to leaves & other parts of plant. • Phloem transports food made in leaves to growing parts of plant.

15. Structures for Survival - Roots Roots • Anchor the plant • Absorb water & nutrients from the soil • Store extra food The more surface area on the root, the more water & nutrients it can absorb. • Root hairs help to increase the surface area.

16. Structures for Survival – RootsTwo Types • Fibrous Roots: several main roots that branch off to form a mass of roots. Ex. Grass, corn, some trees. • Taproots: One large, main root w/ smaller roots branching off. Ex. Carrots, dandelions, cacti,

17. Structures for Survival: Seeds • Seeds have special structures that allow them to be dispersed by wind, water, or animals. • The seeds coat helps protect the embryo from injury and also from drying out.

18. How Seeds Disperse

19. Summary Answer the essential question. Answer… Defense Thorns Toxins (poisons) Thigmotropism (movement) Survival Leaves Stems Roots Seeds • What are some of the structures plants use for defense and survival?

20. Online Interactive Activity • Play the Plant Defenses Game Plants evolve to suit their surroundings and to compensate for any hazards around. Objective: Survive. http://revolution.caret.cam.ac.uk/flash/defence.swf