Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following organisms does NOT show asexual reproduction by means of fission?
Leishmania
Amoeba
Earthworm
Plasmodium
Earthworm
Earthworm does not reproduce by fission; instead, it is a bisexual organism that reproduces sexually through cross-fertilization or self-fertilization. On the other hand, Amoeba, Leishmania, and Plasmodium are unicellular organisms that undergo asexual reproduction via fission (binary or multiple fission).
Earthworm does not reproduce by fission; instead, it is a bisexual organism that reproduces sexually through cross-fertilization or self-fertilization. On the other hand, Amoeba, Leishmania, and Plasmodium are unicellular organisms that undergo asexual reproduction via fission (binary or multiple fission).
Think of unicellular organisms like a photocopier that splits its single page into two identical copies (binary fission) or many copies at once (multiple fission), whereas multicellular earthworms reproduce by combining genetic material from two individuals.
ALF does Fission (Amoeba, Leishmania, Plasmodium Fission)
Fission is a form of asexual reproduction where a unicellular organism splits into two or more daughter cells. Amoeba undergoes binary fission in any plane, Leishmania (a flagellate protozoan) undergoes binary fission in a definite orientation relative to its whip-like flagellum, and Plasmodium undergoes multiple fission inside a cyst during unfavorable conditions.
Fission is common in unicellular organisms belonging to Protista and Monera (e.g., Amoeba, bacteria).
Leishmania reproduces by binary fission in a definite orientation due to its whip-like structure (flagellum).
Plasmodium undergoes multiple fission, producing numerous daughter cells simultaneously.
Earthworm is an annelid that reproduces sexually and is bisexual (hermaphrodite).
Understanding modes of reproduction in unicellular vs. multicellular organisms
Study of disease vectors (Plasmodium causes malaria, Leishmania causes kala-azar)
Option A (Leishmania): Reproduces by binary fission in a specific plane.
Option B (Amoeba): Reproduces by simple binary fission in any irregular plane.
Option C (Earthworm): Multicellular invertebrate reproducing sexually.
Option D (Plasmodium): Reproduces by multiple fission.
C is correct тАФ Earthworm does not show asexual reproduction by fission as it reproduces sexually, whereas Amoeba, Leishmania, and Plasmodium undergo fission.
Always distinguish between unicellular organisms (which reproduce via fission, budding
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants