The Drosophila homeotic genes typically contain the homeobox. The homeobox is a sequence of 180 nucleotides. The number of amino acids coded for by this sequence is
A. 180.
B. 90.
C. 120
D. 60.
E. 30.
Answer: D
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The term for describing a region’s biological wealth is called ____
a. endemic species b. hot spots c. biodiversity d. endangered species e. threatened species
The seed coat of a pine seed
a. is derived from the integuments. b. is produced by the micropyle. c. surrounds the male gametophyte. d. is divided into the hypocotyl-root axis and epicotyl.
Which of the following is not a result of estrogen?
A. breast development B. the uterine cycle C. milk production D. body hair distribution E. fat distribution
Transfer RNA differs from other types of RNA because it
a. transfers genetic instructions from cell nucleus to cytoplasm. b. specifies the amino acid sequence of a particular protein. c. carries an amino acid at one end. d. contains codons. e. has different bases in its nucleotides.