The tropical grassland in Africa is called the
A. tundra.
B. chaparral.
C. taiga.
D. prairie.
E. savanna.
Answer: E
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Migration reduces genetic differences between populations due to gene ____ between the two
Fill in the blank with the appropriate word.
Which of the following is true of deuterostomes?
a. The first opening into the embryo becomes the anus. b. The first opening into the embryo becomes the mouth. c. The second opening into the embryo becomes the anus. d. The second opening into the embryo becomes the mouth. e. Both a and d are true.
To be diagnosed as having hypertension, you consistently will have a diastolic pressure of ______ mm
Hg and a systolic pressure of _____ mm Hg. a. 120; 80 b. 80; 120 c. 90; 140 d. 140; 90 e. 120; 73
How is the four-letter language of nucleic acids converted into the twenty-word language of amino acids?
a. The four nucleic acid bases combine in two-letter combinations that define different amino acids. b. The four nucleic acid bases combine in three-letter sequences that define different amino acids. c. Triplets of the two-letter nucleic acid bases are translated into the twenty different amino acids. d. The four bases each specify one amino acid, which in combination give rise to the remaining sixteen amino acids. e. The four bases are first converted into tRNA molecules, which can each attach to five amino acids.