P-2 Life Processes in Living Organisms Part – 2 — Science STD 10 — Question

(i) Asexual reproduction by multiple fission is performed by amoeba and other similar protists.
(ii) Amoeba stops the formation of pseudopodia and thereby its movements whenever there is lack of food or any other adverse condition.
(iii) It becomes rounded and forms a protective covering around plasma membrane. Such encysted amoeba or any other protist is called as cyst.
(iv) Many nuclei are formed by repeated nuclear division in the cyst, followed by cytoplasmic division and thus many amoebulae are formed.
(v) They remain encysted till there are adverse conditions.
(vi) Cyst breaks open on arrival of favourable conditions and many amoebulae are released.