Fragmentation in Multicellular Organisms Quiz

Reproduction in Spirogyra

• Spirogyra reproduces primarily through conjugation, a form of sexual reproduction where two filaments align and exchange genetic material.
• Vegetative reproduction occurs through fragmentation, where pieces of filament break off and develop into new individuals.

Organisms Using Regeneration

• Regeneration is found in several organisms, including:
  • Echinoderms (like starfish) can regenerate lost arms.
  • Planarians, a type of flatworm, can regenerate their body segments.
  • Some species of salamanders possess remarkable regenerative abilities, including regrowing limbs.

Reproduction in Multicellular Organisms

• Multicellular organisms with differentiated tissues and organs typically reproduce through sexual reproduction, involving the combination of gametes from two parents, leading to genetic diversity.
• Asexual reproduction methods include budding, fission, and fragmentation in certain species.

Self-Amputation in Reproduction

• The method of reproduction involving self-amputation is known as autotomy.
• Common in species such as lizards, which can shed their tails as a defense mechanism that can later regenerate.

Commonality of Regeneration

• Regeneration is a common method of asexual reproduction in organisms like:
  • Hydra, which can reproduce by budding.
  • Worms such as earthworms can regenerate segments of their bodies.
  • Certain plant species also show a high capacity for regeneration through new growth from cuttings.