Alanine gives pyruvic acid on deamination.

How much time does nitrifying bacteria require to grow at an incubation of 250 to 300 C?

Nitrosococcus nitrosus is a nitrite-oxidizing bacteria.

Which among the following is not an ammonia-oxidizing bacteria?

Agrobacterium is involved in which of the following processes?

Which of the following is symbiotic nitrogen fixing bacteria?

Which among the following are the most important agents for carbon dioxide fixation?

Fresh air contains approximately ______ percent carbon dioxide by volume.

In carbon cycle flow of energy is _________________

The reduction of sulphates and sulphites to hydrogen sulphide is done by which group of bacteria?

Which among the following develop in the upper portion of the Winogradsky column?

Which among the following is a non-sulfur purple bacteria?

The moisture contained in clouds and precipitated as snow,hail,rain etc constitutes _________________

Wells less than ___________ deep are considered to be shallow.

Hydrostatic pressure increases the boiling point of water but does not change the solubility of nutrients.

The degree of salinity in freshwater is nearly zero.

Protozoa and other minute animal life are known as ____________________

Phytoplanktonic organisms are non-motile.

Which of the following places shows the presence of Geothermal vents?

Most aquatic microorganisms can grow on the usual laboratory media.

Which of the following techniques is used for identification and enumeration of algae, bacteria, protozoa?