Which of the following statements is INCORRECT?  

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  1. In Amoeba, the splitting of the two cells during division can take place in any plane.  
  2. Yeast can put out small buds that separate and grow further.
  3. Plasmodium divides into many daughter cells simultaneously by binary fission. 
  4. Binary fission occurs in a definite orientation in Leishmania.  

Answer (Detailed Solution Below)

Option 3 : Plasmodium divides into many daughter cells simultaneously by binary fission. 
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Detailed Solution

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The correct answer is Plasmodium divides into many daughter cells simultaneously by binary fission..

Key Points

  • Plasmodium, the causative agent of malaria, primarily reproduces through a process called schizogony, not binary fission.
  • In schizogony, a single cell divides to form multiple daughter cells, but this is distinct from the process of binary fission.
  • Binary fission involves the division of a single organism into two parts, each with a copy of the original DNA, which is not the case in Plasmodium.
  • Plasmodium undergoes multiple fission, forming numerous daughter cells at once, which is a characteristic of its asexual reproduction cycle in the human liver and red blood cells.

Additional Information

  • Amoeba Reproduction
    • Amoeba reproduces by binary fission, where the cell splits into two equal halves, and this can occur in any plane.
    • Each daughter cell is a clone of the parent cell, possessing the same genetic material.
  • Yeast Reproduction
    • Yeast reproduces asexually by budding, where a small bud forms on the parent cell, grows, and eventually separates to become a new individual.
  • Leishmania Reproduction
    • Leishmania reproduces by binary fission, which occurs in a specific orientation along the longitudinal axis of the cell.
    • This process ensures that each daughter cell receives the necessary cellular components to survive and function.
  • Plasmodium Life Cycle
    • Plasmodium has a complex life cycle involving both asexual (schizogony) and sexual (sporogony) reproduction stages.
    • In humans, the asexual stage involves schizogony in liver cells and red blood cells, producing merozoites that infect new cells.
    • The sexual stage occurs in the mosquito vector, leading to the formation of sporozoites, which are transmitted to humans during a mosquito bite.
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