Square planar arrangement of cells that forms when round bacteria remain attached to each other during reproduction are called ________.
A. sarcinae
B. staphylococci
C. streptococci
D. tetrads
Answer: D
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Humans have ____ vertebrae
a. 21 b. 26 c. 23
d. 46 e. 58
The term "reducing atmosphere" for the early Earth means that the atmosphere
A. contained little or no carbon dioxide. B. contained little or no free nitrogen. C. was much thinner around the surface of the Earth than now. D. contained only two or three kinds of gases. E. contained little or no free oxygen.
Which part of a protein is synthesized by a ribosome first?
A. It depends on whether the cell is eukaryotic or prokaryotic. B. the N-terminus C. It depends on the protein. D. the C-terminus E. It depends on where the ribosome binds to the mRNA.
The white of the human eye's exterior is actually the
A) sclera. B) iris. C) fovea. D) pupil. E) retina.