Fruiting structure consists of a tapered column of stalk cells that carries a spherical mass of spores aloft.

TLS Online TPP Program

#Id: 5972

#Unit 10. Ecological Principles

Upwelling zones (where nutrients reach the surface from deeper waters) and continental shelf areas (where bottom sediments in shallow water rapidly exchange nutrients with surface waters) support greater production.

Freshwater production is highest in rivers, shallow lakes, and ponds, where nutrients are most abundant, and lowest in clear streams and deep lakes.

TLS Online TPP Program

#Id: 9331

#Unit 4. Cell Communication and Cell Signaling

In the dark, most transducin is localized to the outer segment, while most arrestin is found in other parts of the cell; in this condition, vision is most sensitive to very low light levels.

TLS Online TPP Program

#Id: 3688

#Unit 2. Cellular Organization

Bacillus anthracis has two large plasmids (extrachromosomal DNA molecules), one of which has a pathogenicity island that includes the gene encoding the anthrax toxin.

TLS Online TPP Program

#Id: 9939

#Unit 4. Cell Communication and Cell Signaling

Tuberculosis

Tuberculosis, caused by Mycobacterium tuberculosis.

Pulmonary infection usually results from inhalation of small droplets of respiratory secretions containing a few bacilli.

TLS Online TPP Program

#Id: 5566

#Unit 7. System Physiology – Animal

Assume first a condition in which osmolality is 300 mOsm/kg of H2O throughout the descending and ascending limbs & medullary interstitium