The probable reason why certain genetic diseases are more common among specific ethnic groups is that the group members share a similar _________________________.?
Fill in the blank(s) with correct word
gene pool
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Water has the ability to dissolve polar covalent molecules like sucrose by
A) forming hydration spheres around the molecule. B) pulling atoms out of the molecule and into solution. C) creating crystals of positively and negatively charged atoms. D) taking electrons from the polar covalent molecule. E) ionization.
Which of the following is a normal response to excessive loss of body heat in a cold
environment? A) Dermal blood vessels dilate. B) Dermal blood vessels constrict. C) Smooth muscles relax. D) Sweat glands become active.
In the heart of cartilaginous fishes, blood enters the _____ and is returned to the systemic circulation by the _____
a. right atrium; left ventricle b. sinus venosus; conus arteriosus c. sinus arteriosus; conus venosus d. sinus venosus; bulbus arteriosus e. sinus arteriosus; bulbus venosus
Which type of action potential propagation occurs along a myelinated axon?
A) continuous B) treppe C) saltatory D) migratory