The alimentary canal is ________.

A. the accessory organs
B. the esophagus
C. the small and large intestines
D. the series of digestive organs


Answer: D

Biology & Microbiology

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Toxic shock syndrome

A. is due to exotoxins produced by Streptococcus pyogenes. B. is due to exotoxins produced by Staphylococcus aureus. C. may spread from person to person. D. has a very low rate of recurrence, approximately 1%.

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Most CO2 reacts with water inside red blood cells to form bicarbonate, due to the activity of

__________. Fill in the blank(s) with the appropriate word(s).

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Which of the following classification categories for humans is not correct?

What will be an ideal response?

Biology & Microbiology

Natural selection ___________.

A. is independent of time or place B. is more of a creative process than an editing process C. and evolution cannot be directly observed D. relies on variation among individuals in a population

Biology & Microbiology