1. Life Science
Introduction

2. Introduction
Plants are the most successful large organisms on our plant
Their flexible structure makes it possible for them to survive in a variety of environments, and their ability to photosynthesize provides enough food to power them and nearly all the animals.
The independence between plants and animals has shaped life on Earth.

3. What is a plant? Plants are multicellular
Plants have cell walls made out of cellulose
Plants develop from multicellular embryos
Plants carry out photosynthesis using chlorophyll
Plants are Autotrophs
Able to produce their own food

4. “Plants are stationary animals that eat sunlight!”

5. Examples of plants ….
Trees
Shrubs
Mosses
Grasses
Ferns …

6. 4 groups of Plants

7. What do plants need to survive?
Surviving as a stationary organism on land is a difficult task, but plants have developed many adaptations that make them successful:
Plants have needs:
Sunlight
Water & Minerals
Movement of Water and Nutrients
Gas Exchange

8. Sunlight
Plants use the energy from the sunlight to carry out photosynthesis
Every plant has adaptations to gather as much sunlight as possible:
Leaves are used to capture sunlight
Shade plants BIG leaves
Sun plants small leaves

9. Water & Minerals
Plants need to supply all their cells with water constantly
Water & minerals are absorbed from the soil
Minerals are needed for plant growth

10. Movement of Water & Nutrients
Plants take up water and minerals through their roots
Xylem (transport pipe) transports water & minerals
Plants make food in their leaves
Phloem (transport pipe) transports food

11. Gas Exchange Plants need Oxygen to breath (cellular respiration)
Make energy (ATP)
Plants needs Carbon dioxide to carry out photosynthesis

12. Vascular Tissue: Xylem & Phloem
Seed plants such as Gymnosperm (Evergreens) and Angiosperm (Flowering Plants) have a bloodstream or vascular tissue.
The vascular tissue:
network of hallow cells
Purpose:
Transport water, nutrients and food throughout the plant

13. Vascular Tissue: Xylem & Phloem
Plants have two types of vascular tissue:
Xylem
Water & Nutrient transport from roots to leaves (UP)
Hallow long dead cell forming tubes
Water impermeable
Water moves freely throughout the tubes

15. Vascular Tissue: Xylem & Phloem
Plants have two types of vascular tissue:
Phloem
Food transportation from leaves to roots (DOWN)
Pipeline with grit through which sugars are carried in a watery

16. “Xy high, Phlo low!”

17. Tapping Maple Trees What is maple syrup ? Where does it come from?
Why do we tap trees in the spring?