The alga used for quick sewage disposal is
Ulothrix
Cladophora
Volvox
Chiarella
B.
Cladophora
Certain algae such as Chlorella, Chlamydomonas, Scenedesmus, Oscillatoria etc., are used for the quick disposal of sewage, domestic and some industrial wastes.
The enzyme responsible for atmospheric nitrogen fixation is
nitrogenase
hydrogenase
oxygenase
carboxylase
Convergent Evolution' is shown by
homologous organs
analogous organs
vestigial organs
all of the above
0n high mountains, difficulty in breathing is due to
decrease in partial pressure of O2
decrease in amount of O2
increase in CO2 concentration
all of the above