What is formation of a cyst by secreting a hard resistant covering

Asked by arghadeep856 | 28th May, 2019, 09:53: PM

Expert Answer:

  • Amoeba reproduces primarily by binary fission.
  • However, a method known as multiple fission is adopted by the unicellular organism Amoeba to survive and reproduce under unfavourable conditions.
  • When the conditions are unfavourable, Amoeba withdraws its pseudopodia and becomes almost round. It secretes a hard covering called cyst.
  • The cyst forms a thick protective coat around it. Inside the cyst, the nucleus undergoes repeated divisions to form many nuclei.
  • Nuclear division is followed by the division of cytoplasm. Hence, eventually many new daughter cells are formed.
  • On the return of favourable conditions, the cyst bursts open to release these daughter cells.

 

Answered by Sheetal Kolte | 29th May, 2019, 10:50: AM