Evolution of embryonic pathways probably occurs most commonly though ____
a. macroevolutionary mechanisms
b. microevolutionary mechanisms
c. protein recruitment
d. extinction
e. mutations during embryonic development
C
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Most digestion in humans occurs in the first 25 centimeters of the 6-meter length of the small intestine called the _________________.
A. cecum B. duodenum C. jejunum D. colon E. omasum
What term describes an exotic species that thrives in a new habitat and quickly threatens the existing environment?
a. a pest species b. a keystone species c. an advanced predator species d. an invasive species
Bile helps in the digestion of _____
a. carbohydrates b. fats c. carbohydrates d. proteins e. nucleic acids
If the concentration of solutes in a cell is less than the concentration of solutes in the surrounding fluid,
then the extracellular fluid is said to be: a. hypertonic. b. hypotonic. c. isotonic. d. stable. e. amphipathic