What is the general ethnic distribution of the sickle-cell gene?
What will be an ideal response?
The gene is most common among the African-American population.
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Assuming some bacteria did enter her body, an example of the second line of defense against
these bacteria includes __________.
a. phagocytes b. mucus c. macrophages d. antibodies
Trochophore and veliger larval stages occur in:
1.barnacles 2.sea urchins 3.sea squirts 4.bivalves
At which point in the graph do voltage-gated potassium channels open?
A) A B) B C) C D) D E) E
Which of the following rules apply to the synthesis of nucleic acids?
a. Nucleotides are added to the 5? end of nucleic acids. b. The synthesis of nucleic acids cannot occur without the presence of an enzyme to catalyze the reaction. c. Strands are synthesized in a parallel direction such that one end of the double-stranded product has the 3? ends and other has the 5? ends. d. Complementary pairing between bases is required for copying nucleic acids.