Rasheed suffers from terrible migraine headaches. They are likely caused by
A) at least three genes and perhaps environmental triggers, such as foods.
B) a single gene but no environmental influences.
C) a missing chromosome.
D) poor diet and susceptibility to infection.
A) at least three genes and perhaps environmental triggers, such as foods.
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The ____________________ are blood pressure receptors located in the carotid arteries. Fill in the blank(s) with the appropriate word(s)
There are different types of microscopes that can be used to provide information about cells. Which type of microscope is used for the observation of living cells?
A) light microscope B) scanning electron microscope C) transmission electron microscope
Bony fishes possess two features not found in other fish. Select the best choice from those listed below to complete the following sentence. Bony fishes have
A. swim bladders and gill covers called opercula. B. swim bladders and a closed circulatory system. C. swim bladders and a complete digestive system. D. swim bladders and movable jaws.
Hydrogen bonds are very important in the functional shape of:
A) proteins and nucleic acids. B) nucleic acids. C) sugars. D) proteins. E) fats.