Question

Whorling whips are named so because of
A. Type of nucleus
B. Mode of movement
C. Mode of reproduction
D. Mode of nutrition

Answer 1

Hint:
Whirling means a quick movement while moving or revolving around and around. This movement is because of the strategic position of the two flagella. Whips is a term associated with the slim and lengthy flagellum.

Complete step by step answer:
A whirling whip is the Greek and Latin translation of dino-flagellate. These microscopically small algae have a thin (cellulose) outer skeleton, which can move with the help of flagella (whirling whips).
Dinoflagellates have two flagella, one (the transverse flagellum) may be contained in a groove-like structure around the equator of the organism (the cingulum), which offers the forward motion and spin to the dinoflagellate, the other (the longitudinal flagellum) trailing behind offering little propulsive force, primarily acting like a rudder. Another feature of the dinoflagellates is the wall composition and structure; early categorisation of the dinoflagellates was based on the existence (referred to as armoured) or absence (termed unarmoured) of a rigid outer cell covering (or theca). Since evidence has been found to suggest there is intergradation between those types. The pattern (or tabulation) of armoured plates forming theca of the so-called armoured forms is still an essential factor of not only dinoflagellate categorisation but dinocyst classification as well. This is because the tabulation of a dinoflagellate may be reflected in the features of the cyst it produces (this is properly known as paratabulation).

Option ‘B’ is correct

Note:
Dinoflagellates are protists that were classified using both the International Code of Zoological Nomenclature (ICZN) and the International Code of Botanical Nomenclature (ICBN), about half of living dinoflagellate species are autotrophs possessing chloroplasts and half are non-photosynthesising heterotrophs. Generally it is now accepted that the ICBN should be utilised for their classification.