The structure designated by the letter "B" in the above figure is called the ____
a. pyloric sphincter
b. esophagus
c. small intestine
d. duodenum
e. appendix
ANSWER: a
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Matching II. Choose the one most appropriate
response for each. Letters may be used more than once. 1. ___ muscle cells 2. ___ lining of the intestine 3. ___ nervous system 4. ___ external body covering 5. ___ skeletal system 6. ___ circulatory system 7. ___ stomach, liver, and pancreas (excluding the muscles and nerves) A. develop(s) from ectoderm in embryo B. develop(s) from endoderm in embryo C. develop(s) from mesoderm in embryo
The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the electrons will be shared in ammonia (NH3). What do you predict about the polarity of ammonia?
A. Each H atom has a partial positive charge. B. The N atom has a strong positive charge. C. The N atom has a partial positive charge. D. Each H atom has a partial negative charge.
All science begins with ________, which is the first step in the process known as the scientific method
Fill in the blank(s) with correct word
If you observe a cell that contains organelles, then that cell is most likely a(n) prokaryote
__________________ Indicate whether the statement is true or false.