Persons with heartburn may have problems with their

a. pyloric sphincter.
b. bursa of Fabricius.
c. cardiac sphincter.
d. Peyer's patches.
e. choane.


C

Biology & Microbiology

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Natural catastrophes are considered the result of ____________

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

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Transposable elements make up about 75% of the DNA in the human genome

A. true B. false

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Which of the following is a deforested area

more likely to experience? a. nutrient poor soils. b. soil loss. c. loss of species diversity. d. warmer temperatures. e. all of these.

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Which of the photographs in the above figure

represents the seedless vascular plants? a. moss b. fern c. conifer d. monocot e. all of these

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