Bilateral symmetry is characteristic of:
a. cnidarians
b. sponges
c. jellyfish
d. flatworms
e. coral polyps
d
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Which of the following mutagens is most different than the others in terms of its effect on DNA?
A. Planar mutagen that inserts between stacked bases B. Acridine orange C. Base analogue D. Intercalating agent
Which hormone deficiency would lead to a female that is not ovulating?
A. follicle-stimulating hormone B. epinephrine C. cortisol D. testosterone E. calcitonin
Which one of the following statements CORRECTLY describes the location of compact bone and spongy bone?
A) Spongy bone is located at the ends, and compact bone is located in the core of the shaft of the bone. B) Compact bone covers the ends of the bone and forms the shaft, and spongy bone is inside the ends, under the compact bone. C) Spongy bone is found on the outside of the shaft, and compact bone forms the hard core of the shaft. D) Spongy bone is found throughout the shaft and ends, covered by a thin layer of compact bone. E) The ends of long bones are solid compact bone, and the shaft is predominantly spongy bone.
Hemolytic uremic syndrome is caused by
A) Escherichia coli O157:H7. B) Serratia marcescens. C) Proteus mirabilis. D) Bacteroides fragilis. E) Salmonella typhi.