An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of ________.

A) four
B) five
C) six
D) seven


Ans: C) six

Biology & Microbiology

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In the identification of mycobacterial isolates, the catalase test involves the:

a. breakdown of phenolphthalein disulfate into phenolphthalein and other salts. b. measurement of the height of a column of bubbles of oxygen. c. production of a lipase that is able to hy-drolyze the catalase. d. development of a pink-to-red color, indi-cating a positive result.

Biology & Microbiology

Broadcast spawning refers to

a. having multiple reproductive partners. b. releasing sperm into surrounding waters. c. releasing eggs into surrounding waters. d. internal fertilization. e. both b and c

Biology & Microbiology

In the peacock butterfly experiment, what was

the conclusion?

a. predatory birds are not deterred from eating peacock butterflies with spots b. predatory birds are deterred by peacock butterfly clicking sounds c. peacock butterflies with spots mated more often than those without spots d. predatory birds are deterred by the dark color of the peacock butterfly e. peacock butterflies that made clicking sounds attracted more predatory birds

Biology & Microbiology

Which of the following diseases is considered an emerging disease?

A. H1N1 B. SARS C. strep throat D. H5N1 E. All of these are considered emerging diseases.

Biology & Microbiology