Electricity

• Nutrition


  The process by which an organism takes food and utilizes it
• Need for Nutrition

  • Organisms need the energy to perform various activities. The energy is supplied by the nutrients.
  • Organisms need various raw materials for growth and repair. These raw materials are provided by nutrients.
• Nutrients


  Materials which provide nutrition to organisms
• Nutrients


  • Carbohydrates
  • Proteins
  • Fats (macronutrients)
  • Minerals
  • Vitamins (micronutrients)
• Modes of Nutrition

  • Autotrophic Nutrition
  • Heterotrophic Nutrition
• Autotrophic Nutrition


  The mode of nutrition in which an organism prepares its own food
• Autotrophs


  Organisms which carry out autotrophic nutrition (green plants)
• Photosynthesis


  Autotrophs intake CO2 and H2O, and convert these into carbohydrates in the presence of chlorophyll and sunlight
• Equation for Photosynthesis
• Nutrition in Plants


  • Green plants prepare their own food. They make food in the presence of sunlight. Sunlight provides energy, carbon dioxide and water are the raw materials and chloroplast is the site where food is made.
• Photosynthesis


  The process by which green plants prepare food
• Raw Materials for Photosynthesis

  • Sunlight
  • Chlorophyll
  • CO2
  • Water
• How raw materials for photosynthesis become available to the plant

  1. Water comes from the soil, through the xylem tissue in roots and stems.

  2. Carbon dioxide comes in the leaves through stomata.
• The process by which cells are produced from pre-existing cells is called cell division.
• Cell division occurs through mitosis, where the nucleus divides into two identical daughter nuclei containing the same number of chromosomes as the parent nucleus.
• Mitosis involves four stages: prophase, metaphase, anaphase, and telophase.