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Question : 6
Total: 15
(a) Differentiate between binary fission in Amoeba and binary fission in Leishmania.
(b) How does reproduction take place in malarial parasite?
(b) How does reproduction take place in malarial parasite?
Solution:
(a) The difference between binary fission in Amoeba and Leishmania are:
(b) Plasmodium reproduces by multiple fissions. The nucleus divides several times into many daughter nuclei. This process takes place inside a cyst which is a protective wall formed in single celled conditions. The nucleus produces many nuclei by undergoing division. The nuclei results in the formation of daughter cells into the cyst. Under favourable conditions, the cyst breaks open, liberating these cells. This type of fission, where not one, but several individuals arise, is called multiple fission.
| S.No | Amoeba | Leishmania |
|---|---|---|
| 1 | Amoebareproduces asexually through binary fission. In this process of reproduction, a single amoeba is divided into two similar daughter cells. It grows larger and one nucleus in the amoeba splits and forms two nuclei. The amoeba is produced by the single parent. | In Leishmania, nuclear division is followed by the appearance of a constriction in the cell membrane. The membrane grows transversely inwards from the middle of the dividing cell. Cytoplasm separates into two equal parts having one nucleus each. The daughter cell may separate from each other and form two new organisms. |
| 2 | In amoeba, splitting of the cell into two during cell division can take place in any plane. | Leishmania has a whip like structure at one end of the cell, hence binary fission occurs in a definite orientation in relation to this structure. |
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