The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains _____

A) 7 neutrons
B) 8 neutrons
C) 8 protons
D) 15 protons


B

Biology & Microbiology

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Choose all that apply. A concentration gradient is exhibited when

_____ the room temperature is 34 degree Celsius and the outside air is 34 degrees Celsius. _____ intracellular fluid has 5% solute and extracellular fluid has 0.8% solute concentration. _____ during rest, muscle and liver cells contain high glycogen concentration and blood contains lower concentrations. _____ the pCO2 changes from 45 to 35 mmHg  in the alveoli of lungs.

Biology & Microbiology

If a pure-breeding wired-hair terrier (WW) is crossed with a pure-breeding smooth-hair terrier (ww), and a puppy with

a wavy hair is produced, the simplest explanation is ____.

a. a mutation has occurred b. hair texture is an X-linked trait c. incomplete dominance d. hair texture is a lethal trait e. codominance

Biology & Microbiology

_______________ increases reabsorption of sodium ions and secretion of potassium ions.

A. Anti-diuretic hormone (ADH) B. Aldosterone C. Atrial natriuretic hormone D. Angiotensin II

Biology & Microbiology

Phosphorus-32 (radioactive) has _____ than phosphorus-35 (normal).

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

Biology & Microbiology