Question

Presence of Tubifex in water body indicates its
A) Purity
B) High salt content
C) Toxic metals
D) Organic loading

Answer 1

Hint:Tubifex is an annelid which is of cosmopolitan nature and occupies the silt of lakes, rivers and sometimes sewer lines. As many as 13 species of Tubifex have been found, which are not easily distinguishable from each other.

Complete answer:
Tubifex worms basically like nutrient-rich water, where bacterial development is most noteworthy. Worms bolster on microscopic organisms and slime. Bacterial development takes place in water which has tall natural stacking like, family natural squanders, mechanical natural squander, and agrarian squander.

At this kind of places, worms get nourishment and places to stow away from predators. A modern consideration of Tubifex worms has highlighted its potential to present hurtful illnesses. These oligochaete worms, which are frequently collected from sewage-contaminated mud, are well-known nourishment for the certain tropical angle.

Worms and the tubifex worms of the aquarium exchange are well-known oligochaetes. Commonplace tubifex worms are burrowers bolstering on microbes and natural particles within the sediment.

Additional information:
Tubifex tubifex, moreover called the slime worm, or sewage worm could be a species of tubificid fragmented worm that occupies the silt of lakes and rivers on a few landmasses. Tubifex likely incorporates a few species, but recognizing between them is troublesome since the regenerative organs, commonly utilized in species identification, are resorbed after mating, as a result, the outside characteristics of the worm change with changes in salinity.

The correct answer is option ‘D’.

Note:Tubifex can survive dry spell and nourishment deficiency. Encystment may moreover work within the dispersal of the worm. They more often than not possess the foot dregs of lakes, waterways, and every so often sewer lines and outlets.