Cellular structures that function in movement and consist of numerous short hairlike extensions from the cell are called ________
Fill in the blank(s) with correct word
cilia
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Which of the following was determined by
Watson and Crick?
a. the amount of adenine in a DNA molecule equals the amount of thymine b. DNA is a double helix c. DNA has a phosphate backbone d. the sequence of DNA bases is different in different organisms e. none of these were determined by Watson and Crick
The showy feathers of a male peacock versus the plain feathers of a female peacock is an example of
A. sexual dimorphism. B. animal cognition. C. habituation. D. distraction display. E. piloting.
Immunity acquired by transplacental transfer is called __________.
A) artificially acquired active immunity B) artificially acquired passive immunity C) naturally acquired passive immunity D) naturally acquired active immunity
A codon is a particular combination of three nucleotides. Therefore, there are ________ possible combinations of the nucleotides A, C, G, and T
A) 16 B) 4 C) 12 D) 64 E) 32