Colorado tick fever is caused by a ________ and can cause headache, muscle aches and conjunctivitis in some individuals
A) coltivirus
B) rotavirus
C) mumps virus
D) hantavirus
E) coxsackie B virus
A
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Which of the following may form one colony?
A. A single bacterial cell B. A small clump of bacteria C. A short chain of bacteria D. All of the choices are correct.
Tanisha and Tawanda are twins but do not look alike. They are the result of fertilization of
A) one oocyte by two sperm cells. B) two oocytes by one sperm cell. C) two oocytes by two sperm cells. D) one oogonium by one spermatogonium.
Which of the following hormones is produced only when a woman is pregnant?
a. testosterone b. gonadotropic-releasing hormone c. human chorionic gonadotropin d. estrogen e. progesterone
Which of the following statements about nucleotide structure is false?
a. The sugar can be either ribose or deoxyribose. b. The sugar is bonded to the phosphate group. c. The nitrogenous base is bonded to the sugar. d. The phosphate group is bonded to the nitrogenous base.