1. Introduction To Plant Science
Introduction To AgriScience

2. Objective 1.1 What roles do plants serve in the ecosystem
Plants serve several roles in our ecosystem by providing the following items:
Oxygen
Food
Reduce soil erosion
Medicines

3. Objective 1.2 How plant differ from animal
Plants differ from animals in several ways
Plants produce their own food with the aid of nutrients from the soil.
Plants are stationary.
Plants have rigid cell walls with cell membranes inside.
Plants utilize carbon dioxide and give off oxygen.

4. Objective 1.3 List how plants and animals are alike.
Plants and animals are alike in several ways.
They have a life cycle.
They carry on life processes, such as circulation, respiration and growth.
They are made of cells.
They must have food.

5. Objective 1.4 List three major factors that affect plant growth
Major factors in climate that effect plant growth include:
Temperature
Warm season plants start growing in the spring and finish in the fall. I.e., bananas, oranges, cotton and corn.
Cool season plants have a life cycle that begins in the fall and ends when summer begins. I.e., wheat, rye, and oats.

6. Objective 1.4 (cont.)
Precipitation
Light

7. Objective 1.5 Define life cycle in terms of plants and how they are classified
Life Cycle: refers to the length of the plant’s life.
Plants can be classified into three groups on the basis of their life cycle:
Annuals- complete life within one year.
Biennials- complete life cycle in two years.
Perennials- plants live for more than two years.
Deciduous- plants that lose their leaves in the winter.
Evergreens- plants that retain their leaves year round.
*Plants may be perennials but only used as an annual in the agricultural industry. I.e. cotton

8. Objective 1.6 List the different parts of a plant
Parts of the plants are of two major kinds:
Vegetative
Leaves- makes food for the plant through a process known as photosynthesis.
Blade -Veins
Epidermis -Stomata
Internal cells -Waxy coating
Petiole -Stipule

9. Parts of a Leaf Waxy Coating Stomata Stipule Petiole Vein Stipule

10. Objective 1.7 List the two different types of leaves
Leaves are divided into two groups:
Simple
Compound

11. Simple Leaf

12. Compound Leaf

13. Objective 1.8 List the three ways leaves attach to the stem
Leaves attach to the stem in several different ways.
Alternate
Opposite
Whorled

14. Alternate Attachment

15. Opposite Attachment

16. Whorled Attachment

17. Objective 1.9 List the different functions of the stem
The stem supports the leaves and flowers.
The stem transport water and other materials.
The stems also store food.

18. Objective 1.10 List the different parts of the stem
Bark
Cortex
Phloem
Cambium
Xylem
Pith

20. Xylem & Pholem

21. Objective 1.11 List the types and roles of roots
Role of roots
Roots anchor the plant.
Roots take in water and minerals.
Roots store energy.
Types of roots
Taproots
Fibrous roots

22. Taproot

23. Fibrous Root

24. Taproot vs. Fibrous