1. Plant Adaptation
Noadswood Science, 2012

2. Plant Adaptation To know how plants are adapted
Saturday, September 07, 2019
Plant Adaptation
To know how plants are adapted

3. Respiration & Photosynthesis
Complete the respiration and photosynthesis worksheet

4. Respiration & Photosynthesis
carbon dioxide + water (+ light energy) → oxygen + glucose
oxygen + glucose → carbon dioxide + water (+ energy)
Photosynthesis
0400 – 2000
1200 – 1600 was when most CO2 was used
Photosynthesis happens fastest when the light is brightest
Fewer bubbles
Less light = slower photosynthesis
More bubbles
More of the raw materials for photosynthesis

5. The Leaf
Leaves are designed for one thing – making food via photosynthesis
Leaves are broad and flat to capture lots of light
Veins carry water to the leaf, and food away to the rest of the plant (veins also support the leaf)
Small holes called stomata in the underside of the leaf allow gases in and out

6. Leaf Components
There are specialised parts to a leaf which help with photosynthesis

7. Epidermal Cells & Waxy Cuticle
Cells in the epidermis make wax which covers the leaf surface (especially at the top) which limits water loss and acts as a protective barrier

8. Palisade Cells
These cells are full of chloroplasts (containing chlorophyll) which it where photosynthesis takes place

9. Spongy Mesophyll
This layer is full of air spaces which allows CO2 to reach chloroplasts in the palisade layer

10. Stomata
Stomata are tiny holes which allow CO2 into the leaf (they also allow water to escape)
The stomata are pores which open and close automatically controlled by guard cells
When there is lots of water they become turgid so the pore opens
When there is not much water they become flacid which closes the pore preventing water loss but it also stops CO2 getting in so photosynthesis stops too!

11. Xylem & Phloem
Xylem transports water
Phloem transports food

12. Photosynthesis