1. PHOTOSYNTHESIS,2

2. AIM: How are green plants adapted for photosynthesis?
Do now: If you were designing an efficient leaf for photosynthesis, describe the characteristics you would include and explain why.
Vocabulary- adaptation, epidermis, stomata, palisade layer, veins.

3. It is the main organ for photosynthesis in most green plants.

4. The leaf is adapted to carry out the process of photosynthesis
Adaptation
The leaf is adapted to carry out the process of photosynthesis
the leaf solves how to make food

6. A- Provides large surface area for absorption of light energy

7. LEAF ANATOMY

12. Compare and contrast Spongy layer and Palisade layer of a leaf
Spongy layer vs. Palisade layer

14. At night the pores close, opening in the daytime

16. Guard cells maintain HOMEOSTASIS (stable condition inside plant cells)

17. Analyze the structures of the leaves below
Adaptation
The leaf is adapted to carry out the process of photosynthesis
the leaf solves how to make food

18. Features of leaves Adaption Purpose Large surface area
To absorb more light
Thin
Short distance for carbon dioxide to diffuse into leaf cells
Chlorophyll
Absorbs sunlight to transfer energy into chemicals
Network of veins
To support the leaf and transport water and carbohydrates
Stomata
Allow carbon dioxide to diffuse into the leaf

19. Structure of leaves Adaption Purpose Epidermis is thin and transparent
To allow more light to reach the palisade cells
Thin cuticle made of wax
To protect the leaf without blocking out light
Palisade cell layer at top of leaf
To absorb more light
Spongy layer
Air spaces allow carbon dioxide to diffuse through the leaf, and increase the surface area
Palisade cells contain many chloroplasts
To absorb all the available light

20. Which structures are listed in order from the least complex to the most complex?
(1) plant cell, leaf, chloroplast, rose bush
(2) chloroplast, plant cell, leaf, rose bush
(3) chloroplast, leaf, plant cell, rose bush
(4) rose bush, leaf, plant cell, chloroplast

21. Regents question practice
In some land plants, guard cells are found only on the lower surfaces of the leaves. In some water plants, guard cells are found only on the upper surfaces of the leaves. Explain how guard cells in both land and water plants help maintain homeostasis. In your answer be sure to:
• identify one function regulated by the guard cells in leaves
• explain how guard cells carry out this function

23. EXIT SLIP
How do guard cells of a leaf help to maintain homeostasis in a plant?

24.
Limiting Factors
Photosynthesis requires the following 3 factors:
Carbon dioxide
Water
Light
There are a 3 factors which affect the rate at which a plant can make glucose by photosynthesis.
The Concentration of Carbon Dioxide
The Light Intensity
The Temperature