Question

Which of the following are likely to be present in deep sea water?
(This question has multiple correct answers)
A) Archaebacteria
B) Eubacteria
C) Blue-green algae
D) Saprophytic fungi

Answer 1

Hint:The dwelling place of an organism is called a Habitat. For the organisms to survive in the deep sea they must be capable of withstanding high pressure, lack of sunlight, high salinity, lack of diffused oxygen.

Complete answer:
Archaebacteria can withstand extreme environmental conditions such as salinity, pH, temperature, light. Archaebacteria can live in all the conditions of the deep sea and hence they are found dwelling there. Several Eubacteria are found dwelling in the deep sea, many eubacteria develop anaerobically in the deep sea, this feature is adapted as a course of evolution. Blue green algae can also dwell in the deep sea as they require blue and green wavelengths of light to sustain, since blue and green components of light have short wavelength and high energy, these light waves can penetrate to the deep easily and enable the survival of Blue-green algae. Saprophytic fungi are not found in the deep sea as they require marshy regions where they can get enough amount of dead and decaying matter and less predation.

Hence Options (A), (B) and (C) are the correct answers.

Note:Archaebacteria are those unicellular bacterias which can survive in extreme environmental conditions. Eubacteria are those unicellular bacteria which can survive in all conditions, they are also called True bacteria. Blue-green algae are cyanobacterias which produce blue and green coloured pigments. Saprophytic fungi belongs to kingdom Mycota and are found nourishing themselves on dead and decaying organisms.