Question

Binary fission is oblique in
A. Ceratium
B. Noctiluca
C. Fuligo
D. Vorticella

Answer 1

Hint:- Binary fission is a type of asexual reproduction in which a single living cell or organelle is twice the size of a single living cell or organelle and then separates into two equal daughter cells, each of which has the capacity to expand to the size of the original cell or organelle.

Complete answer:
The cytoplasm division occurs oblique (i.e. left and right oblique) in oblique binary fission. This form of division occurs in dinoflagellates such as Ceratium. Binary fission separates a group of distinct species, including both prokaryotes and eukaryotes. Most bacteria replicate through this process. The approach includes the use of the FtsZ protein to separate, including chromosomal multiplication, chromosomal segregation, and cell division. However, in protozoans such as amoeba, Paramecium, Euglena, the process could differ in the division of cells and how the cytoplasm divides. Bacillus subtilis, B. includes species which reproduce by binary fission.
Examples: Cereus, B. Pumilus, Clostridium perfringens, Escherichia coli, Corynebacterium diphtheriae, Amoeba, Ceratium, Paramecium, Euglena, etc.
From these discussions we can conclude that Binary fission is oblique in Ceratium. Therefore the correct answer is option (A).

Additional information:-
Binary fission consists of four forms based on the cytoplasm division plane:
- Binary Irregular Fission
- Binary Transverse Fission
- Binary Fission Longitudinal
- Binary Fission in Oblique

Note:- In many prokaryotes, including archaea, cyanobacteria, eubacteria, and certain eukaryotes including amoeba and Paramecium, binary fission is the mode of reproduction. By the mechanism of binary fission, some cell organelles such as mitochondria also undergo cell division. A bacterium must split at the right time, in the right place, in order to stay viable and competitive, and must give a complete copy of its vital genetic material to each offspring.