The bending of a light ray as it passes through a medium such as a lens is known as ___.
A) revolving
B) refraction
C) magnification
D) resolution
Ans: B) refraction
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Acinetobacter baumanii has become a high-profile opportunistic pathogen, causing wound infections, urinary tract infections, pneumonia and septicemia. What is the reason for its high-profile nature?
A.) A. baumanii has a very low infective dose and nearly everyone that contacts it gets a very serious infection. B.) A. baumanii produces an exotoxin that causes servere diarrhea. C.) A. baumanii is very fastidious and is difficult to culture in the laboratory. D.) Many strains of A. baumanii are highly resistant to antibiotics.
In the name Escherichia coli, coli is the
a. Domain. b. Kingdom. c. Genus. d. Specific epithet. e. Discoverer.
Four of the following animals form eusocial groups. Which one is the exception?
A. Termites B. Mole rats C. Wolf pack D. Honey bees E. Ants
Body appendages as diverse as crab legs, beetle legs, sea star arms, butterfly wings, fish fins, and mouse feet start out as ____.
A. clusters of cells in the limb buds B. cerebral cells C. cardiac cells D. offshoots of the sperm cell E. offshoots of the egg