1. An Explanation of Why Plants Do What They Do
All About Plants
An Explanation of Why Plants Do What They Do

2. Photosynthesis
Photosynthesis is a way for plants to interact with the environment by exchanging gases and nutrients to produce energy.

3. Capturing the Sun’s Energy
Chloroplasts absorb light for photosynthesis

4. Gas Exchange
Carbon dioxide enters the plant through small openings in the leaves called Stomata. Singular-stoma

5. Stoma

6. Glucose Some is… Used for energy Used for storage
Used for making cellulose (fiber)

7. Glucose

8. What happens to the oxygen?
The oxygen from plants allows other organisms to breathe and is used for Cellular Respiration.

9. What Is an Autotroph?
Produce their own food (aka Producers.

10. What Is a Heterotroph?
A heterotroph is an organism that cannot produce its own food.
They are also called “consumers.”

11. Algae
Algae do photosynthesis but lack the parts that common plants have.
They can be simple single celled organisms or multicellular.

12. Non-Vascular Plants Absorb water from their environment.
They do not have roots.
They typically grow in wet, or moist climates

13. Non-Vascular Plants
Moss

14. Oldest Plants
The oldest plants on the Earth were simple plants made of one cell like algae.
These still exist today.

15. Vascular Plants
Vascular Plants have roots and stems.

16. Types of Vascular Plants
Either they make seeds or they don’t.
Seed Plants and Seedless Plants

17. Seed Plants (Vascular)
Seed Plants either flower or they don’t.
This one flowers
Angiosperms

18. Seeds
Cotyledons store food for the seed (advantage)

19. Angiosperms (Fruits and Flowers)

20. Non-Flowering Seed Plants
Gymnosperms
( cones)

21. Birds and Bees
Move pollen
Stimulates growth

22. Sexual Reproduction Male and female parts combine genetic information.
Leads to diversity (advantage).

23. Parts of a Flower Stamen-male part Pistil-female part
Anthers release pollen
Pollen goes down stigma and forms pollen tube to ovule
Fertilization

24. Ovule Fertilized
Ovary becomes fruit.
Seed dispersion.

25. Asexual Reproduction
Spider Plants

26. Food Web

27. The End