The midclavicular planes pass through the mid- point of the clavicles to the midpoint of which of the following structures?
(A) anterior superior iliac spine
(B) symphysis pubis
(C) umbilicus
(D) inguinal ligament
(E) xiphoid process
Ans: (D) inguinal ligament
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Mating a purebred Labrador retriever to a purebred poodle to produce "Labradoodles" is an example of
A. true-breeding. B. hybridization. C. self-fertilizing. D. inbreeding. E. mixed breeding.
Adenoviruses are responsible for causing diseases such as keratoconjunctivitis, pneumonia, hemorrhagic cystitis, and gastroenteritis in children. Transmission is usually via:
a. contact with rodent urine. b. respiratory secretions. c. arthropod vector. d. sexual contact.
A small angle for a branch point in an evolutionary tree indicates
A. extinction. B. punctuated equilibrium. C. gradualism. D. convergent evolution. E. temporal isolation
The major difference between protostomes and deuterostomes is the
A) presence or absence of cephalization. B) type of body symmetry. C) way the body cavity forms. D) presence or absence of a coelom. E) presence or absence of tissues.