nitrogen

What will be an ideal response?


Nitrogen enters the living world via free-living and symbiotic bacteria, which incorporate nitrogen into their macromolecules through nitrogen fixation

Nitrogen fixation is eventually converted from organic nitrogen back into nitrogen gas by bacteria.

Biology & Microbiology

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The tube through which urine leaves the urinary bladder is the

a. collecting duct. b. urethra. c. renal pelvis. d. ureter. e. renal vein.

Biology & Microbiology

The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic effects of Pitx1 gene _____

A) duplication (gain in number) B) elimination (loss) C) mutation (change) D) silencing (loss of expression)

Biology & Microbiology

One inanimate source of illness is fumes, which can gain access to the body through:

a. Skin B. Infection C. Inhalation and skin D. skin and digestive skin

Biology & Microbiology

All staphylococci can be differentiated from all streptococci because only staphylococci produce the enzyme _____ that is easily detected in the lab.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology