Which unicellular organism has a whip-like structure at one end of the cell and binary fission occurs in a definite orientation in relation to these structures?

The correct answer is Leishmania.

Key Points

• Leishmania is a genus of protozoan parasites that has a whip-like structure called a flagellum at one end of the cell.
• These flagella are crucial for the motility of the organism, aiding in its movement and infection processes.
• Binary fission in Leishmania occurs in a specific orientation, ensuring that the division is coordinated with the position of the flagellum.
• The presence of flagella and orientation-specific binary fission are key characteristics that distinguish Leishmania from other unicellular organisms.

Additional Information

• Flagellum
  • A flagellum is a long, whip-like structure that protrudes from the cell body and is used for locomotion and sensory functions.
  • In many protozoa, flagella are vital for movement, allowing them to swim through liquid environments.
• Binary Fission
  • Binary fission is an asexual mode of reproduction common among unicellular organisms.
  • During binary fission, the parent cell divides into two equal-sized daughter cells.
• Leishmaniasis
  • Leishmaniasis is a disease caused by infection with Leishmania parasites, which are spread by the bite of infected sandflies.
  • It can cause skin sores, fever, and damage to the spleen and liver.
• Protozoa
  • Protozoa are a diverse group of unicellular eukaryotic organisms.
  • They can be free-living or parasitic and are found in various aquatic environments and soil.