Elements 72Zn, 75As, and 74Ge have the ________.

A) same number of protons
B) same number of protons and electrons
C) same number of neutrons
D) same number of neutrons and electrons


Ans: C) same number of neutrons

Biology & Microbiology

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The most recent techniques developed in the biological sciences allow the manipulation of DNA with the ultimate goal of intervening directly with the _______ fate of organisms. 

A. genetic B. developmental C. adult D. mitotic

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Peptidoglycan is a compound in

a. bacterial flagella. b. bacterial cell walls. c. archaean cell walls. d. archaean flagella. e. all of these.

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Someone who has just had a glass of wine will soon make less of this hormone

A) renin B) aldosterone C) atrial natriuretic peptide D) antidiuretic hormone

Biology & Microbiology

Chemical messengers produced in one part of the body that control the activity of other parts are called _________

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

Biology & Microbiology