Trichosporonoides nigrescens is an xerophile. Thus, it can resist low availability of water. It is able to grow at water activities as low as 0.75.

The role of the contractile vacuoles is to pump water out of the cell through a process called osmoregulation. Too much water in the cells may lead to bursting of cells. They expand when water enters (called the diastole) and contract when filled with water, carrying water along with wastes outside the cell (called the systole).

Milnesium tardigradum is a tardigrade microorganism that exhibits a high degree of radioresistance.

The order Firmacutes included all Gram-positive organisms. Bacillus sps. is an example.

Spirochetes have periplasmic flagella. They reside inside the cell, within the periplasmic space.

Low temperature Crenarchaeota named Nitrosopumilus maritimus is an ammonia-oxidising organism. It affects the oceanic nitrogen cycle.

Only Rickettsia synthesises ATP as a source of energy. Thus, they differ in the source of their energy.

Beijierinckia is characterised by rod shape and peritrichous flagella.

P. fluorescens is of medicinal value because an antibiotic called Muipirocin is produced by culturing this organism. It is used in treating ear, skin and eye disorders.

Correct Answer: Facultatively anaerobic non-motile rods occurring as long kinked filaments

Gluconobacter has polar flagella whereas Acetobacter has peritrichous flagella.

Fibrobacteres is a small bacterial phylum which includes many of the major rumen bacteria. They allow the degradation of plant-based cellulose in ruminant animals.

Nanoarchaeum equitans appears to be an obligate symbiont on the archaeon Ignicoccus. It is one of the smallest known cellular organisms and the smallest known archaeon.

Planctomycetes are a phylum of aquatic bacteria. Bacteria of this phyla are ovoid in shape with a characteristic holdfast. They reproduce by budding.

Streptomyces coelicolor has G-C content of 72%. It has the highest G-C content.