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Biological Terms

Biological Terms. Life Cycles . Annual – a plant that completes its life cycle in one year. Biennial – a plant that completes its life cycle in two years. Perennial - a plant that lives more than two years. Leaf Retention . Decidous – loses leaves during dormant season

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Biological Terms

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  1. Biological Terms

  2. Life Cycles • Annual – a plant that completes its life cycle in one year. • Biennial – a plant that completes its life cycle in two years. • Perennial - a plant that lives more than two years.

  3. Leaf Retention • Decidous – loses leaves during dormant season • Evergreen- keeps leaves remains green year – round

  4. Hormones • Inhibitors hasten a fruit ripening, inhibits or restrains seed germination and stem elongation. • Cytokinins – hormones that work with auxins to stimulate cell division • Gibberellins – hormones that stimulate cell elongation, premature flowering and breaking dormancy • Auxins – hormones that speed plant growth by stimulating cell enlargement

  5. Moisture in plants • Turgid – plant is swollen or filled with moisture • Wilted – plant is limp because it does not have enough moisture.

  6. Stages of Growth • Juvenile - when plant first starts to grow from a seed • Reproductive – when plant produces flowers, seeds and fruits • Dormant –when plant rests or grows very little if any

  7. Plant Processes • Photosynthesis – the food manufacturing process in green plants that combine carbon dioxide and water in the presence of light to make sugar and oxygen. • Formula is : 6CO2 + 6H2O+672 Kcal R C6H1206 +6O2

  8. Respiration-the process through which plant leaves, stems and roots consume oxygen and give off carbon dioxide. Plants produce much more oxygen through photosynthesis than they use through respiration. • Absorption-the process by which plant roots take in water and air. • Transpiration-the process by which plants lose water from leaves and stems through evaporation.

  9. Translocation-the process by which food and nutrients are moved within a plant from one plant part to another. • Reproduction-the plant process that increases plant numbers usually from seeds. • Osmosis – process by which minerals and water enter the plant through cell walls.

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