Trypanosoma and Leshmania species are transmitted by
A) direct person-to-person contact.
B) insect vectors.
C) contaminated food or water.
D) contaminated needles and syringes.
Answer: B
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Hox genes, one class of ____ genes, contain a conserved ____ region to which transcription factors containing a
corresponding ____ bind.
a. maternal effect; homeodomain; homeoboxb. segmentation; homeobox; homeodomain c. segmentation; homeodomain; homeobox d. homeobox; homeobox; homeodomain e. homeobox; homeodomain; homeobox
Which statement concerning radioisotope 14C
is false? a. It can be substituted for 12C in glucose and the body will still be able to use the compound. b. It has a different number of protons than 12C. c. It has more neutrons than 12C. d. It behaves the same chemically as 12C. e. It has six carbons and eight neutrons
Which of the following were integrated in a unified theory of evolution called the modern synthesis?
a. biogeography, comparative morphology, comparative embryology, genetics, paleontology, and taxonomy b. biogeography, comparative morphology, comparative embryology, genetics, and paleontology c. biogeography, comparative morphology, comparative embryology, and genetics d. biogeography,
Which of the following statements about diabetes mellitus is NOT true?
A. Type I diabetes is much more common than type II. B. Obesity can cause diabetes because adipose tissue produces a substance that impairs insulin receptor function. C. Symptoms of diabetes include excessive thirst, frequent urination, and glucose in the urine. D. Type I diabetes occurs as a result of destruction of the insulin-producing cells. E. One method of treating type II diabetes is exercise and a low-fat, low-sugar diet.