question_answer

(i) Life begins from a single cell in all sexually reproducing organisms. Justify.

(ii) Describe the process of sporulation in Amoeba.

Answer:

(i) Life begins from a single cells in all sexually reproducing organisms. Gametes fuse to form zygote. This zygote is the first cell from which life begins.

(ii) Under unfavorable conditions, Amoeba reproduces by the formation of spores internally which starts with the breakdown of nuclear membrane and release of chromatic blocks into the cytoplasm. About 200 spores are formed inside a single parent Amoeba. Finally the body of parent Amoeba disintegrates to release spores. The spores remain inactive for some time and on getting favorable conditions each spore forms a young Amoeba.