Introduction To Plant Science

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Presentation transcript:

Introduction To Plant Science Introduction To AgriScience and Technology GHS Mr. Ham

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

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.

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.

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.

Objective 1.4 (cont.) Precipitation Light

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

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

Parts of a Leaf Waxy Coating Stomata Stipule Petiole Vein Stipule

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

Simple Leaf

Compound Leaf

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

Alternate Attachment

Opposite Attachment

Whorled Attachment

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.

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

Xylem & Pholem

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

Taproot

Fibrous Root

Taproot vs. Fibrous