1. How do the parts of a plant help it meet it’s needs?
Chapter 1 – Investigation 2 9/28/10

2. Roots Underground foundation of a plant Anchor the plant in the ground
Absorb water and minerals and transport them to other parts of the plant
In some plants they store food (ex. Carrots/Beets)
2 Different Types of Roots
Taproot = one main root
Fibrous = branching roots

3. Parts of a Roots
Xylem Tissue – Carry water and minerals UP from the soil to the stem
Phloem Tissue – Carry nutrients DOWN from the stem, towards the roots
Root Hairs – Take in Water and Minerals
Root Cap – Pushes the root through the soil

4. Stems Connects the roots and the leaves
Supports the leaves and the flowers
Xylem and Phloem tissues continue in stem and transport materials to the leaves
2 Types of Stems
Woody (tree trunk)
Non-Woody (flowers)

5. Leaves Grows out of the stem
Food-making factory of the plant – where “photosynthesis” occurs
Trap the sunlight’s energy
Absorbs Carbon Dioxide
2 Types of Leaves
Broad Leaved
Needle Leaved

6. Parts of a Leaf
Blade – flat part of the leaf which is exposed to the sun
Veins – Where water enters the leaves
Petiole – Transport system (extension of the Xylem and Phloem tissues)

7. Photosynthesis
Process in which plants produce their own food using sunlight (as energy), carbon dioxide, and water
“photo” – light “synthesis” – joining together
Chlorophyll is a green pigment found in tiny cell structures called chloroplasts
Chlorophyll uses the sun light’s energy to change carbon dioxide and water into food (glucose). Waste product - oxygen

8. Photosyntheis (2)
Plants use the energy in glucose to grow, produce seeds and carry out life functions
The process of using oxygen to release this energy in food (glucose) is called Cell Respiration
Plants store extra food in the form of starch

9. Plant Responses
Tropism – a plant response to conditions in the environment
3 Types
“Geo-tropic” – roots respond to gravity by growing towards the center of the Earth
“Photo-tropic” – Leaves/Stems grow or bend towards the light
“Hydro-tropic” – Roots in the soil grow towards water or wet areas