As water boils and turns to steam, what happens to the hydrogen bonds?
a. The hydrogen bonds break.
b. The hydrogen bonds become stronger.
c. The hydrogen bonds generate additional bonds.
d. The hydrogen bonds form a crystalline lattice structure.
e. The hydrogen bonds continually break and join together again.
a
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Why are sensory organs, such as eyes, located on the surface of the body?
A. Their location is adaptive; it allows sensory organs to receive input from the environment. B. Their location is adaptiveit allows sensory organs to receive input from the central nervous system. C. Their location is an artifact of development; these structures are derived from mesoderm. D. Their location is an artifact of development; these structures are derived from endoderm. E. None of the answer options is correct; there is a better explanation that is not listed.
Two pure-breeding phlox plants were crossed, one with dark-blue flowers and the other with pink flowers. The F1 generation all had dark-blue flowers. When the F1 were crossed with each other, the F2 generation consisted of 176 plants: 101 with dark-blue flowers, 33 with light-blue flowers, 30 with red flowers, and 10 with pink flowers. What progeny types would result from crossing a homozygous plant with light-blue flowers to a homozygous plant with red flowers?
A) all would be dark blue B) all would be red C) 1 light blue : 1 red D) 9 dark blue : 3 light blue : 3 red : 1 pink
Most often, radiation doses are expressed in terms of damage
a. True b. False
True or False: Food spoilage is NOT always caused by microorganisms
a. TRUE b. FALSE