All of the following structures are found in the digestive system of birds EXCEPT a(n)
A) gizzard.
B) small intestine.
C) abomasum.
D) crop.
E) esophagus.
C
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As a population geneticist, you find a species of snails with more genetic diversity than humans. What does this mean?
A. The snails have more genes on their chromosomes than humans. B. There is more variety in gene pool of snails than humans. C. The snails have more DNA than humans. D. The snails have more mutations occurring than humans. E. There is not enough information to answer the question.
What is the name of the area where bones meet and interact?
a. joint b. ligament c. osteoblast d. bony matrix e. connective tissue
The anatomical structure identified with the
letter "C" in the figure above is a. the arterial wall. b. the lumen. c. atherosclerotic plaque. d. the capillary wall. e. none of these
During the Pleistocene epoch, plant communities changed dynamically in response to which mechanism?
a. a meteor impact b. iridium in the soil c. fluctuating climates d. intense grazing pressure e. competition with gymnosperms