Varicose veins are the result of:
a. excessive blood volume
b. torn walls of veins
c. slow blood movement
d. damaged valves
e. excessive exercise
d
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Which test provides the earliest indication of genetic problems in a fetus?
A. Amniocentesis B. Chorionic villus sampling C. Both provide reliable indications at the same stage of development
________ is the name given to the technique that utilizes radioactive molecules that bind to specific membrane proteins.
Fill in the blank(s) with the appropriate word(s).
One of the important assumptions made during the study of heritability in twins is that monozygotic twins share all
their ____________________ and their ____________________.Fill in the blank(s) with the appropriate word(s).
The methanogens, producers of methane gas, require environments that
A. have abundant oxygen and CO2. B. are very acidic. C. have sunlight. D. are extremely cold. E. are anaerobic with hydrogen gas and CO2.