Special Modes: Saprotrophs and Symbiosis

Saprotrophic Nutrition

Living on Decay

Saprotrophs secrete digestive enzymes onto dead organic matter to dissolve it, then absorb the nutrients. They are the recyclers of the natural world.
Image 1

Key Points

  1. Fungi like mushrooms and bread mould are saprotrophs.
  2. They require moist and warm environments to grow.
  3. External Digestion: Breaking down food outside the body.
  4. They help clean the environment by decomposing waste.

Symbiotic Relationships

Mutual Success

Symbiosis is a 'living together' arrangement where both organisms benefit. This partnership allows them to survive where individuals might fail.
Image 1

Key Points

  1. Lichens: Algae (makes food) + Fungi (provides shelter).
  2. Rhizobium: Lives in root nodules and fixes nitrogen for plants.
  3. Mycorrhiza: Fungi helping roots absorb water and phosphorus.
  4. Essential for maintaining soil fertility in agriculture.

Olympiad Fact

Rhizobium is particularly found in leguminous plants like peas, beans, and grams.

Swipe to skip‹