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Answer:

is answer D

Explanation:

The structure that is responsible for the movement of white blood cells to engulf infectious bacteria is - Microfilament.

Microfilaments are the narrowest type of cytoskeleton fibers. The function is the movement, provides rigidity and shape. These filaments are made of two intertwined strands of a globular protein called actin.

  • They can depolymerize and reform quickly allows the cell to change its shape and move.
  • White blood cells make good use of this ability.
  • They can move to the site of infection with the help of microfilament and phagocytize the bacteria.
  • White blood cells move from blood to the site of infection.
  • The movement of WBC is assisted by the polymerization and depolymerization of microfilaments.

Thus, the structure that is responsible for the movement of white blood cells to engulf infectious bacteria is - Microfilament.

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