The number of electrons of an atom determines its ________.
A. bonding properties
B. isotope
C. chemical element
D. all of the above are correct
Answer: A
Biology & Microbiology
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The cell junctions labeled “A” in the figure
a. prevent movement of materials between cells. b. are found in tissues subjected to stretching. c. allow the free passage of materials between cells. d. are found mostly in heart muscle. e. are found in most tissues except in the stomach.
Biology & Microbiology
A cell can only respond to signals from other cells, not from the physical environment.
a. true b. false
Biology & Microbiology
Which of the following is not a way to identify an organism by phenotype?
A) Microscopy B) Growth on agar C) DNA profiling
Biology & Microbiology
In humans, the front of the larynx is commonly referred to as
(a) the voice box. (b) the Adam’s apple. (c) the food pipe. (d) both a and b
Biology & Microbiology