Fusion of two gametes dissimilar in size, as in species of Eudorina is termed as ______.

The correct answer is anisogamous.

Key Points

• Algae are chlorophyll-bearing organisms, with a simple thalloid-like structure and, are autotrophic in the mode of nutrition.
• Algae live primarily aquatic organisms which may live in both freshwater and marine water.
• The algae reproduce by vegetative, asexual, and sexual methods.
• Sexual reproduction in algae takes place through the fusion of two gametes.
• Sexual reproduction is of three types.
  1. Isogamous
  2. Anisogamous
  3. Oogamous

• Anisogamous is a condition in which fusion of two gametes takes place which is dissimilar in size.

Additional Information

• Isogamous is a condition in which the fusion of two gametes takes place which is similar in size.
  • For example - Spirogyra, Ulothrix.
• Oogamous is a condition in which fusion between one large, nonmotile (static) female gamete and a smaller, motile male gamete occurs.
  • For example- Volvox.
• In algae, vegetative reproduction occurs through fragmentation
  • Each fragment develops into a thallus.
  • In Asexual reproduction in algae, different types of spores are produced.