Which of the following layers lies next to the lumen

of the intestinal tract?
a. longitudinal muscles
b. circular muscles
c. submucosa
d. mucosa
e. serosa


Answer: d

Biology & Microbiology

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Which of the following molecules are able to

cut DNA molecules at specific sequences?

a. assembly enzymes b. hydrolytic enzymes c. restriction enzymes d. ligase enzymes e. repair enzymes

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Select the best response to the question. ?What significant development has decreased the incidence of epiglottitis?

A) the administration of the Haemophilus influenza type B (Hib) vaccine B) advances in airway management C) early recognition of the symptoms D) the development of effective antibiotics

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Describe the spatial patterns of light and nutrients in a lake, and explain why these patterns exist

What will be an ideal response?

Biology & Microbiology

The two strands of a DNA molecule contain nitrogen bases which are

A. parallel. B. complementary. C. identical. D. proportionate. E. random.

Biology & Microbiology